Peter,

> I have not tried the Register yet but I wonder how VC++ will search for files since some files like stdafx.h have multiple copies but different version in the computer.

VC++ searches for files in folders, specified in VC++ options. PSDK registering just adds PSDK folders to VC++ paths.
stdafx.h is not a standard include file. It belongs to your project and contains standard include files for pre-compiling.

>You mentioned that if the image file exist already, the GDI+ will fail. I have tried to capture the image many times without deleting the jpg file and it has no problem.

Yes, it works, but I don't know why. I remember that I had this problem in gpImage class (maybe with other image type, not jpg). What's why I added the code to delete already existing file before saving. I'll try to check this issue later.

Alexander