You just write a method with the same signature as the 'real' function, and add your own code to return a good or bad status as appropriate. For example the Windows function GetFileVersionInfo() could be coded like this BOOL GetFileVersionInfo(LPCTSTR lptstrFilename, DWORD dwHandle, DWORD dwLen, LPVOID lpData ) { OutputDebugString("My test"); return TRUE; } MVP 2010 - are they mad?

I was trying to create a utility that would tell me what configuration an exe was built in. But as you say its just a set of compiler options. I understand it now. Thanks for explaining. I have a lot more questions but ill save it for another time. :)

I can no other answer make, but, thanks, and thanks.

Thanks for your reply.