485BPOS

As filed with the U.S. Securities and Exchange Commission on November 13, 2012

Securities Act File No. 33-4026

Investment Company Act File No. 811-4612

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

	THE SECURITIES ACT OF 1933	x
	Pre-Effective Amendment No.	¨
	Post-Effective Amendment No. 36	x
and/or
REGISTRATION STATEMENT
UNDER
	THE INVESTMENT COMPANY ACT OF 1940	x

Amendment No. 38

(Check appropriate box or boxes)

BLACKROCK EUROFUND

(Exact Name of Registrant as Specified in Charter)

100 Bellevue Parkway

Wilmington, Delaware 19809

(Address of Principal Executive Office)

Registrant’s Telephone Number, including Area Code (800) 441-7762

John M. Perlowski

BlackRock EuroFund

55 East 52^nd Street, New York, New York 10055

(Name and Address of Agent for Service)

Copies to:

Counsel for the Fund: Margery K. Neale, Esq. Willkie Farr & Gallagher LLP 787 Seventh Avenue New York, New York 10019-6099 Benjamin Archibald, Esq. BlackRock Advisors, LLC 55 East 52^nd Street New York, New York 10055

Continuous

(Approximate Date of Proposed Offering)

It is proposed that this filing will become effective:

x immediately upon filing pursuant to paragraph (b)

¨ on (date) pursuant to paragraph (b)

¨ 60 days after filing pursuant to paragraph (a)(1)

¨ on (date) pursuant to paragraph (a)(1)

¨ 75 days after filing pursuant to paragraph (a)(2)

¨ on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

¨ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Title of Securities Being Registered: Shares of Beneficial Interest, par value $0.10 per share.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for the effectiveness of this Registration Statement under Rule 485(b) under the Securities Act and it has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and the State of New York on November 13, 2012.

	BlackRock EuroFund
	(Registrant)
By:	/s/ JOHN M. PERLOWSKI
	(John M. Perlowski,
	Chief Executive Officer)

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

Signature	Title	Date
/s/ JOHN M. PERLOWSKI	Chief Executive Officer	November 13, 2012
John M. Perlowski	(Principal Executive Officer)
/s/ NEAL J. ANDREWS	Chief Financial Officer (Principal	November 13, 2012
Neal J. Andrews	Financial and Accounting Officer)
JAMES H. BODURTHA*	Trustee
(James H. Bodurtha)
BRUCE R. BOND*	Trustee
(Bruce R. Bond)
DONALD W. BURTON*	Trustee
(Donald W. Burton)
STUART E. EIZENSTAT*	Trustee
(Stuart E. Eizenstat)
KENNETH A. FROOT*	Trustee
(Kenneth A. Froot)
ROBERT M. HERNANDEZ*	Trustee
(Robert M. Hernandez)

JOHN F. O’BRIEN*	Trustee
(John F. O’Brien)
ROBERTA COOPER RAMO*	Trustee
(Roberta Cooper Ramo)
DAVID H. WALSH*	Trustee
(David H. Walsh)
FRED G. WEISS*	Trustee
(Fred G. Weiss)
PAUL L. AUDET*	President and Trustee
(Paul L. Audet)
LAURENCE D. FINK*	Trustee
(Laurence D. Fink)
HENRY GABBAY*	Trustee
(Henry Gabbay)

*By:	/s/ BENJAMIN ARCHIBALD	November 13, 2012
	Benjamin Archibald (Attorney-in-Fact)

EXHIBIT INDEX

Index No.	Description of Exhibit
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

BLACKROCK EUROFUND

Prospectus Date

rr_ProspectusDate

Oct. 26, 2012

BLACKROCK EUROFUND

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Overview

Key Facts about BlackRock EuroFund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The investment objective of the BlackRock EuroFund (the “EuroFund” or the “Fund”) is to seek capital appreciation primarily through investment in equities of corporations domiciled in European countries.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in the BlackRock-advised fund complex. More information about these and other discounts is available from your financial professional and in the “Details about the Share Classes” section on page 17 of the Fund’s prospectus and in the “Purchase of Shares” section on page II-58 of the Fund’s statement of additional information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees
(fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage
of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover:

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 162% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

162.00%

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

A contingent deferred sales charge (“CDSC”) of 1.00% is assessed on certain redemptions of Investor A Shares made within 18 months after purchase where no initial sales charge was paid at time of purchase as part of an investment of $1,000,000 or more.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in the BlackRock-advised fund complex.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

25,000

Expense Example [Heading]

rr_ExpenseExampleHeading

Example:

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

You would pay the following expenses if you did not redeem your shares:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the EuroFund will invest at least 80% of its net assets in equity securities, including common stock and convertible securities, of companies located in Europe. For these purposes, “net assets” include any borrowings for investment purposes. Equity securities include common stock, preferred stock, securities convertible into common stock or securities or other instruments whose price is linked to the value of common stock. Common stock are securities representing shares of ownership of a corporation. Convertible securities are securities, such as corporate bonds or preferred stock, that are exchangeable for shares of common stock of the issuer or another company. The EuroFund currently expects that a majority of the Fund’s assets will be invested in equity securities of companies in Western European countries, but may also invest in emerging markets in Eastern European countries. Within particular countries the EuroFund considers the condition and growth potential of industry sectors and selects what Fund management believes are companies with attractive valuations or good prospects for earnings growth within those sectors. The Fund may invest in companies of any size.

Under normal circumstances, the Fund anticipates it will allocate a substantial amount (approximately 40% or more — unless market conditions are not deemed favorable by BlackRock, in which case the Fund would invest at least 30%) — of its total assets in foreign securities, which may include securities (i) of foreign government issuers, (ii) of issuers organized or located outside the U.S., (iii) of issuers which primarily trade in a market located outside the U.S., or (iv) of issuers doing a substantial amount of business outside the U.S., which the Fund considers to be companies that derive at least 50% of their revenue or profits from business outside the U.S. or have at least 50% of their sales or assets outside the U.S. The Fund will allocate its assets among various regions and countries (but in no less than three different countries). For temporary defensive purposes the Fund may deviate substantially from the allocation described above.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

Risk is inherent in all investing. The value of your investment in the Fund, as well as the amount of return you receive on your investment, may fluctuate significantly from day to day and over time. You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments. The following is a summary description of principal risks of investing in the Fund.

• Convertible Securities Risk — The market value of a convertible security performs like that of a regular debt security; that is, if market interest rates rise, the value of a convertible security usually falls. In addition, convertible securities are subject to the risk that the issuer will not be able to pay interest or dividends when due, and their market value may change based on changes in the issuer’s credit rating or the market’s perception of the issuer’s creditworthiness. Since it derives a portion of its value from the common stock into which it may be converted, a convertible security is also subject to the same types of market and issuer risks that apply to the underlying common stock.

• Emerging Markets Risk — Emerging markets are riskier than more developed markets because they tend to develop unevenly and may never fully develop. Investments in emerging markets may be considered speculative. Emerging markets are more likely to experience hyperinflation and currency devaluations, which adversely affect returns to U.S. investors. In addition, many emerging securities markets have far lower trading volumes and less liquidity than developed markets.

• Equity Securities Risk — Stock markets are volatile. The price of equity securities fluctuates based on changes in a company’s financial condition and overall market and economic conditions.

• Foreign Securities Risk — Foreign investments often involve special risks not present in U.S. investments that can increase the chances that the Fund will lose money. These risks include:

— The Fund generally holds its foreign securities and cash in foreign banks and securities depositories, which may be recently organized or new to the foreign custody business and may be subject to only limited or no regulatory oversight.

— Changes in foreign currency exchange rates can affect the value of the Fund’s portfolio.

— The economies of certain foreign markets may not compare favorably with the economy of the United States with respect to such issues as growth of gross national product, reinvestment of capital, resources and balance of payments position.

— The governments of certain countries may prohibit or impose substantial restrictions on foreign investments in their capital markets or in certain industries.

— Many foreign governments do not supervise and regulate stock exchanges, brokers and the sale of securities to the same extent as does the United States and may not have laws to protect investors that are comparable to U.S. securities laws.

— Settlement and clearance procedures in certain foreign markets may result in delays in payment for or delivery of securities not typically associated with settlement and clearance of U.S. investments.

— The European financial markets have recently experienced volatility and adverse trends due to concerns about economic downturns in, or rising government debt levels of, several European countries. These events have adversely affected the exchange rate of the Euro and may spread to other countries in Europe, including countries that do not use the Euro. These events may affect the value and liquidity of certain of the Fund’s investments.

• Geographic Concentration Risk — From time to time the Fund may invest a substantial amount of its assets in issuers located in a single country or a limited number of countries. If the Fund concentrates its investments in this manner, it assumes the risk that economic, political and social conditions in those countries will have a significant impact on its investment performance. The Fund’s investment performance may also be more volatile if it concentrates its investments in certain countries, especially emerging market countries.

• Income Producing Stock Availability Risk — Depending upon market conditions, income producing common stock that meets the Fund’s investment criteria may not be widely available and/or may be highly concentrated in only a few market sectors. This may limit the ability of the Fund to produce current income while remaining fully diversified.

• Market Risk and Selection Risk — Market risk is the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. Selection risk is the risk that the securities selected by Fund management will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies. This means you may lose money.

Risk Lose Money [Text]

rr_RiskLoseMoney

You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The information shows you how the Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund. The table compares the Fund’s performance to that of the Morgan Stanley Capital International Europe Index (“MSCI Europe Index”), which is relevant to the Fund because it has characteristics similar to the Fund’s investment strategies. The returns for Class R Shares prior to January 3, 2003, the commencement of operations of Class R Shares, are based on the performance of the Fund’s Institutional Shares. The returns for Class R Shares, however, are adjusted to reflect the distribution and service (12b-1) fees applicable to Class R Shares. As with all such investments, past performance (before and after taxes) is not an indication of future results. Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown. However, the table includes all applicable fees and sales charges. If the Fund’s investment manager and its affiliates had not waived or reimbursed certain Fund expenses during these periods, the Fund’s returns would have been lower. Updated information on the Fund’s performance can be obtained by visiting http://www.blackrock.com/funds or can be obtained by phone at 800-882-0052.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The information shows you how the Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800-882-0052

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.blackrock.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

As with all such investments, past performance (before and after taxes) is not an indication of future results.

Bar Chart [Heading]

rr_BarChartHeading

Investor A Shares
ANNUAL TOTAL RETURNS¹
BlackRock EuroFund
As of 12/31

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

During the ten-year period shown in the bar chart, the highest return for a quarter was 27.37% (quarter ended June 30, 2009) and the lowest return for a quarter was –25.16% (quarter ended September 30, 2011). The year-to-date return as of September 30, 2012 was 15.88%.

Performance Table Heading

rr_PerformanceTableHeading

As of 12/31/11
Average Annual Total Returns

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

However, the table includes all applicable fees and sales charges.

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual Federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown for Investor A Shares only, and the after-tax returns for Investor B, Investor C, Institutional and Class R Shares will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual Federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Investor A Shares only, and the after-tax returns for Investor B, Investor C, Institutional and Class R Shares will vary.

BLACKROCK EUROFUND | Investor A Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.25%

Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

^[1]

Management Fee

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.33%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.33%

1 Year

rr_ExpenseExampleYear01

653

3 Years

rr_ExpenseExampleYear03

924

5 Years

rr_ExpenseExampleYear05

1,216

10 Years

rr_ExpenseExampleYear10

2,042

2002

rr_AnnualReturn2002

(12.65%)

2003

rr_AnnualReturn2003

34.75%

2004

rr_AnnualReturn2004

19.62%

2005

rr_AnnualReturn2005

9.70%

2006

rr_AnnualReturn2006

33.52%

^[2]

2007

rr_AnnualReturn2007

12.52%

2008

rr_AnnualReturn2008

(44.65%)

2009

rr_AnnualReturn2009

32.83%

2010

rr_AnnualReturn2010

0.70%

2011

rr_AnnualReturn2011

(14.68%)

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2012

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

15.88%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

27.37%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(25.16%)

1 Year

rr_AverageAnnualReturnYear01

(19.16%)

5 Years

rr_AverageAnnualReturnYear05

(7.60%)

10 Years

rr_AverageAnnualReturnYear10

3.34%

^[2]

BLACKROCK EUROFUND | Investor B Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOfferingPrice

4.50%

^[3]

Management Fee

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

1.60%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

3.35%

1 Year

rr_ExpenseExampleYear01

788

3 Years

rr_ExpenseExampleYear03

1,380

5 Years

rr_ExpenseExampleYear05

1,945

10 Years

rr_ExpenseExampleYear10

3,178

1 Year

rr_ExpenseExampleNoRedemptionYear01

338

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,030

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,745

10 Years

rr_ExpenseExampleNoRedemptionYear10

3,178

1 Year

rr_AverageAnnualReturnYear01

(20.03%)

5 Years

rr_AverageAnnualReturnYear05

(8.08%)

10 Years

rr_AverageAnnualReturnYear10

3.15%

^[2]

BLACKROCK EUROFUND | Investor C Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOfferingPrice

1.00%

^[4]

Management Fee

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.47%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.22%

1 Year

rr_ExpenseExampleYear01

325

3 Years

rr_ExpenseExampleYear03

694

5 Years

rr_ExpenseExampleYear05

1,190

10 Years

rr_ExpenseExampleYear10

2,554

1 Year

rr_ExpenseExampleNoRedemptionYear01

225

3 Years

rr_ExpenseExampleNoRedemptionYear03

694

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,190

10 Years

rr_ExpenseExampleNoRedemptionYear10

2,554

1 Year

rr_AverageAnnualReturnYear01

(16.36%)

5 Years

rr_AverageAnnualReturnYear05

(7.40%)

10 Years

rr_AverageAnnualReturnYear10

3.04%

^[2]

BLACKROCK EUROFUND | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fee

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.42%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.17%

1 Year

rr_ExpenseExampleYear01

119

3 Years

rr_ExpenseExampleYear03

372

5 Years

rr_ExpenseExampleYear05

644

10 Years

rr_ExpenseExampleYear10

1,420

1 Year

rr_AverageAnnualReturnYear01

(14.56%)

5 Years

rr_AverageAnnualReturnYear05

(6.43%)

10 Years

rr_AverageAnnualReturnYear10

4.12%

^[2]

BLACKROCK EUROFUND | Class R Shares

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)

rr_MaximumDeferredSalesChargeOverOfferingPrice

none

Management Fee

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.71%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.96%

1 Year

rr_ExpenseExampleYear01

199

3 Years

rr_ExpenseExampleYear03

615

5 Years

rr_ExpenseExampleYear05

1,057

10 Years

rr_ExpenseExampleYear10

2,285

1 Year

rr_AverageAnnualReturnYear01

(15.28%)

5 Years

rr_AverageAnnualReturnYear05

(7.17%)

10 Years

rr_AverageAnnualReturnYear10

3.57%

^[2]

BLACKROCK EUROFUND | Return After Taxes on Distributions | Investor A Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(20.17%)

5 Years

rr_AverageAnnualReturnYear05

(9.22%)

10 Years

rr_AverageAnnualReturnYear10

2.07%

^[2]

BLACKROCK EUROFUND | Return After Taxes on Distributions and Sale of Shares | Investor A Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(12.46%)

5 Years

rr_AverageAnnualReturnYear05

(6.66%)

10 Years

rr_AverageAnnualReturnYear10

2.60%

^[2]

BLACKROCK EUROFUND | MSCI Europe Index (Reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(11.06%)

5 Years

rr_AverageAnnualReturnYear05

(5.20%)

10 Years

rr_AverageAnnualReturnYear10

4.35%

[1] A contingent deferred sales charge ("CDSC") of 1.00% is assessed on certain redemptions of Investor A Shares made within 18 months after purchase where no initial sales charge was paid at time of purchase as part of an investment of $1,000,000 or more.

[2] A portion of the Fund's total return was attributable to a payment by the previous investment adviser in order to resolve a regulatory issue relating to an investment in the fiscal year ended October 31, 2006.

[3] The CDSC is 4.50% if shares are redeemed in less than one year. The CDSC for Investor B Shares decreases for redemptions made in subsequent years. After six years there is no CDSC on Investor B Shares. (See the section "Details about the Share Classes - Investor B Shares" in the Fund's prospectus for the complete schedule of CDSCs.)

[4] There is no CDSC on Investor C Shares after one year.

XML

BLACKROCK EUROFUND

Fund Overview

Key Facts about BlackRock EuroFund

Investment Objective

The investment objective of the BlackRock EuroFund (the “EuroFund” or the “Fund”) is to seek capital appreciation primarily through investment in equities of corporations domiciled in European countries.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in the BlackRock-advised fund complex. More information about these and other discounts is available from your financial professional and in the “Details about the Share Classes” section on page 17 of the Fund’s prospectus and in the “Purchase of Shares” section on page II-58 of the Fund’s statement of additional information.

Shareholder Fees
(fees paid directly from your investment)

Shareholder Fees BLACKROCK EUROFUND	Investor A Shares		Investor B Shares		Investor C Shares		Institutional Shares	Class R Shares
Maximum Sales Charge (Load) Imposed on Purchases (as percentage of offering price)	5.25%		none		none		none	none
Maximum Deferred Sales Charge (Load) (as percentage of offering price or redemption proceeds, whichever is lower)	none	[1]	4.50%	[2]	1.00%	[3]	none	none

Annual Fund Operating Expenses
(expenses that you pay each year as a percentage
of the value of your investment)

Annual Fund Operating Expenses BLACKROCK EUROFUND	Investor A Shares	Investor B Shares	Investor C Shares	Institutional Shares	Class R Shares
Management Fee	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	1.00%	none	0.50%
Other Expenses	0.33%	1.60%	0.47%	0.42%	0.71%
Total Annual Fund Operating Expenses	1.33%	3.35%	2.22%	1.17%	1.96%

Example:

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example BLACKROCK EUROFUND (USD $)	1 Year	3 Years	5 Years	10 Years
Investor A Shares	653	924	1,216	2,042
Investor B Shares	788	1,380	1,945	3,178
Investor C Shares	325	694	1,190	2,554
Institutional Shares	119	372	644	1,420
Class R Shares	199	615	1,057	2,285

You would pay the following expenses if you did not redeem your shares:

Expense Example, No Redemption BLACKROCK EUROFUND (USD $)	1 Year	3 Years	5 Years	10 Years
Investor B Shares	338	1,030	1,745	3,178
Investor C Shares	225	694	1,190	2,554

Portfolio Turnover:

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 162% of the average value of its portfolio.

Principal Investment Strategies of the Fund

Under normal circumstances, the EuroFund will invest at least 80% of its net assets in equity securities, including common stock and convertible securities, of companies located in Europe. For these purposes, “net assets” include any borrowings for investment purposes. Equity securities include common stock, preferred stock, securities convertible into common stock or securities or other instruments whose price is linked to the value of common stock. Common stock are securities representing shares of ownership of a corporation. Convertible securities are securities, such as corporate bonds or preferred stock, that are exchangeable for shares of common stock of the issuer or another company. The EuroFund currently expects that a majority of the Fund’s assets will be invested in equity securities of companies in Western European countries, but may also invest in emerging markets in Eastern European countries. Within particular countries the EuroFund considers the condition and growth potential of industry sectors and selects what Fund management believes are companies with attractive valuations or good prospects for earnings growth within those sectors. The Fund may invest in companies of any size.

Under normal circumstances, the Fund anticipates it will allocate a substantial amount (approximately 40% or more — unless market conditions are not deemed favorable by BlackRock, in which case the Fund would invest at least 30%) — of its total assets in foreign securities, which may include securities (i) of foreign government issuers, (ii) of issuers organized or located outside the U.S., (iii) of issuers which primarily trade in a market located outside the U.S., or (iv) of issuers doing a substantial amount of business outside the U.S., which the Fund considers to be companies that derive at least 50% of their revenue or profits from business outside the U.S. or have at least 50% of their sales or assets outside the U.S. The Fund will allocate its assets among various regions and countries (but in no less than three different countries). For temporary defensive purposes the Fund may deviate substantially from the allocation described above.

Principal Risks of Investing in the Fund

Risk is inherent in all investing. The value of your investment in the Fund, as well as the amount of return you receive on your investment, may fluctuate significantly from day to day and over time. You may lose part or all of your investment in the Fund or your investment may not perform as well as other similar investments. The following is a summary description of principal risks of investing in the Fund.

• Convertible Securities Risk — The market value of a convertible security performs like that of a regular debt security; that is, if market interest rates rise, the value of a convertible security usually falls. In addition, convertible securities are subject to the risk that the issuer will not be able to pay interest or dividends when due, and their market value may change based on changes in the issuer’s credit rating or the market’s perception of the issuer’s creditworthiness. Since it derives a portion of its value from the common stock into which it may be converted, a convertible security is also subject to the same types of market and issuer risks that apply to the underlying common stock.

• Emerging Markets Risk — Emerging markets are riskier than more developed markets because they tend to develop unevenly and may never fully develop. Investments in emerging markets may be considered speculative. Emerging markets are more likely to experience hyperinflation and currency devaluations, which adversely affect returns to U.S. investors. In addition, many emerging securities markets have far lower trading volumes and less liquidity than developed markets.

• Equity Securities Risk — Stock markets are volatile. The price of equity securities fluctuates based on changes in a company’s financial condition and overall market and economic conditions.

• Foreign Securities Risk — Foreign investments often involve special risks not present in U.S. investments that can increase the chances that the Fund will lose money. These risks include:

— The Fund generally holds its foreign securities and cash in foreign banks and securities depositories, which may be recently organized or new to the foreign custody business and may be subject to only limited or no regulatory oversight.

— Changes in foreign currency exchange rates can affect the value of the Fund’s portfolio.

— The economies of certain foreign markets may not compare favorably with the economy of the United States with respect to such issues as growth of gross national product, reinvestment of capital, resources and balance of payments position.

— The governments of certain countries may prohibit or impose substantial restrictions on foreign investments in their capital markets or in certain industries.

— Many foreign governments do not supervise and regulate stock exchanges, brokers and the sale of securities to the same extent as does the United States and may not have laws to protect investors that are comparable to U.S. securities laws.

— Settlement and clearance procedures in certain foreign markets may result in delays in payment for or delivery of securities not typically associated with settlement and clearance of U.S. investments.

— The European financial markets have recently experienced volatility and adverse trends due to concerns about economic downturns in, or rising government debt levels of, several European countries. These events have adversely affected the exchange rate of the Euro and may spread to other countries in Europe, including countries that do not use the Euro. These events may affect the value and liquidity of certain of the Fund’s investments.

• Geographic Concentration Risk — From time to time the Fund may invest a substantial amount of its assets in issuers located in a single country or a limited number of countries. If the Fund concentrates its investments in this manner, it assumes the risk that economic, political and social conditions in those countries will have a significant impact on its investment performance. The Fund’s investment performance may also be more volatile if it concentrates its investments in certain countries, especially emerging market countries.

• Income Producing Stock Availability Risk — Depending upon market conditions, income producing common stock that meets the Fund’s investment criteria may not be widely available and/or may be highly concentrated in only a few market sectors. This may limit the ability of the Fund to produce current income while remaining fully diversified.

• Market Risk and Selection Risk — Market risk is the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. Selection risk is the risk that the securities selected by Fund management will underperform the markets, the relevant indices or the securities selected by other funds with similar investment objectives and investment strategies. This means you may lose money.

Performance Information

The information shows you how the Fund’s performance has varied year by year and provides some indication of the risks of investing in the Fund. The table compares the Fund’s performance to that of the Morgan Stanley Capital International Europe Index (“MSCI Europe Index”), which is relevant to the Fund because it has characteristics similar to the Fund’s investment strategies. The returns for Class R Shares prior to January 3, 2003, the commencement of operations of Class R Shares, are based on the performance of the Fund’s Institutional Shares. The returns for Class R Shares, however, are adjusted to reflect the distribution and service (12b-1) fees applicable to Class R Shares. As with all such investments, past performance (before and after taxes) is not an indication of future results. Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown. However, the table includes all applicable fees and sales charges. If the Fund’s investment manager and its affiliates had not waived or reimbursed certain Fund expenses during these periods, the Fund’s returns would have been lower. Updated information on the Fund’s performance can be obtained by visiting http://www.blackrock.com/funds or can be obtained by phone at 800-882-0052.

Investor A Shares
ANNUAL TOTAL RETURNS¹
BlackRock EuroFund
As of 12/31

During the ten-year period shown in the bar chart, the highest return for a quarter was 27.37% (quarter ended June 30, 2009) and the lowest return for a quarter was –25.16% (quarter ended September 30, 2011). The year-to-date return as of September 30, 2012 was 15.88%.

As of 12/31/11
Average Annual Total Returns

Average Annual Total Returns BLACKROCK EUROFUND	1 Year	5 Years	10 Years
Investor A	(19.16%)	(7.60%)	3.34%	[1]
Investor A Return After Taxes on Distributions	(20.17%)	(9.22%)	2.07%	[1]
Investor A Return After Taxes on Distributions and Sale of Shares	(12.46%)	(6.66%)	2.60%	[1]
Investor B	(20.03%)	(8.08%)	3.15%	[1]
Investor C	(16.36%)	(7.40%)	3.04%	[1]
Institutional	(14.56%)	(6.43%)	4.12%	[1]
Class R	(15.28%)	(7.17%)	3.57%	[1]
MSCI Europe Index (Reflects no deduction for fees, expenses or taxes)	(11.06%)	(5.20%)	4.35%

After-tax returns are calculated using the historical highest individual Federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Investor A Shares only, and the after-tax returns for Investor B, Investor C, Institutional and Class R Shares will vary.

[1] A contingent deferred sales charge ("CDSC") of 1.00% is assessed on certain redemptions of Investor A Shares made within 18 months after purchase where no initial sales charge was paid at time of purchase as part of an investment of $1,000,000 or more.

[2] The CDSC is 4.50% if shares are redeemed in less than one year. The CDSC for Investor B Shares decreases for redemptions made in subsequent years. After six years there is no CDSC on Investor B Shares. (See the section "Details about the Share Classes - Investor B Shares" in the Fund's prospectus for the complete schedule of CDSCs.)

[3] There is no CDSC on Investor C Shares after one year.

[1] A portion of the Fund's total return was attributable to a payment by the previous investment adviser in order to resolve a regulatory issue relating to an investment in the fiscal year ended October 31, 2006.

[1] A portion of the Fund's total return was attributable to a payment by the previous investment adviser in order to resolve a regulatory issue relating to an investment in the fiscal year ended October 31, 2006.

XML

Document and Entity Information	12 Months Ended
	Oct. 26, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	Jun. 30, 2012
Registrant Name	BLACKROCK EUROFUND
Central Index Key	0000790525
Amendment Flag	false
Document Creation Date	Oct. 26, 2012
Document Effective Date	Oct. 26, 2012
Prospectus Date	Oct. 26, 2012

XML

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Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	BLACKROCK EUROFUND
Prospectus Date	rr_ProspectusDate	Oct. 26, 2012
Document Creation Date	dei_DocumentCreationDate	Oct. 26, 2012