Document and Entity Information	0 Months Ended
	Dec. 31, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	Dec. 31, 2012
Registrant Name	MORGAN STANLEY FOCUS GROWTH FUND
Central Index Key	0000314366
Amendment Flag	false
Document Creation Date	Apr. 26, 2013
Document Effective Date	Apr. 30, 2013
Prospectus Date	Apr. 30, 2013
Morgan Stanley Focus Growth Fund | A
Risk/Return:
Trading Symbol	AMOAX
Morgan Stanley Focus Growth Fund | B
Risk/Return:
Trading Symbol	AMOBX
Morgan Stanley Focus Growth Fund | L
Risk/Return:
Trading Symbol	AMOCX
Morgan Stanley Focus Growth Fund | I
Risk/Return:
Trading Symbol	AMODX