How to find a substring from an ANSI file in a string from a unicode file in C++?

Question

C++ / C#

Hello! There is a source file with text (can be either ANSI or Unicode ) and a file with words that need to be replaced in the source text (always in ANSI). For the source file in ANSI everything works, but as soon as I switch to Unicode, the search for substrings does not give positive results. Tried using the MultiByteToWideChar and mbstowcs functions but that didn't help.

Answer 1

What's the problem with MultiByteToWideChar? Is the transformation taking place?