Exhibit 24.2

                                POWER OF ATTORNEY
                      FOR SECTION 16 REPORTING OBLIGATIONS

                                October 11th, 2023

        KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes and
appoints each of Bruno Ferreccio and Reynaldo Roisenvit, signing singly, the
undersigned's true and lawful attorney-in-fact to: (i) execute for and on
behalf of the undersigned, in the undersigned's capacity as an officer and/or
director and/or owner of greater than 10% of the outstanding common stock of
Vista Credit Strategic Lending Corp., a Maryland Corporation (the "Company"),
Forms 3, 4 and 5 (including any amendments, supplements or exhibits thereto) in
accordance with Section 16(a) of the Securities Exchange Act of 1934 and the
rules thereunder; (ii) do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any
such Form 3, 4 or 5 (including any amendments, supplements or exhibits thereto)
and timely file such form with the United States Securities and Exchange
Commission (the "SEC") and any stock exchange or similar authority, including
without limitation the filing of a Form ID or any other documents necessary or
appropriate to enable the undersigned to file the Form 3, 4 and 5
electronically with the SEC; (iii) seek or obtain, as the undersigned's
representative and on the undersigned's behalf, information on transactions in
the Company's securities from any third party, including brokers, employee
benefit plan administrators and trustees, and the undersigned hereby authorizes
any such person to release any such information to each of the undersigned's
attorneys-in-fact appointed by this Power of Attorney and ratifies any such
release of information; and (iv) take any other action of any type whatsoever
in connection with the foregoing which, in the opinion of such attorney-in-
fact, may be of benefit to, in the best interest of, or legally required by,
the undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney shall be in such form and shall contain such terms and conditions as
such attorney-in-fact may approve in such attorney-in-fact's discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Power of Attorney and the
rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

        This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of the date first written above.

                                   Signed and acknowledged:

                                   /s/ Luis Felipe Castellanos
                                   -------------------------------
                                   Name: Luis Felipe Castellanos
                                         -------------------------------

                                  /s/ Juan Antonio Castro
                                  ---------------------------------
                                  Name: Juan Antonio Castro