So: get yourself a hex editor (I use "HxD", it's free) and edit the "Client99SE.exe" file. The call to SHGetPathFromIDListA does not do anything noteworthy, so I replaced all instructions related to that call with NOP instructions. The dialog gets confused and doesn't succeed in opening the file. But, a call to the windows function SHGetPathFromIDListA corrupts the memory where the filename is stored (it puts a zero where the string starts, which, in the null-terminated string world, means that the string is now suddenly empty).
The library dialog tries to concatenate the filename and path of the selected library file to obtain a full path to the library file that you want to add.
Quote (Copy of GuntherVB's post) Ok, I just spent a long day debugging Protel 99 SE (Service Pack 6) in OllyDbg to solve the problem of not being able to load the library files in Windows 7 ("File not recognized").
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