I think this is an easy one:

I need to capture the drive letter where the launch executable is stored. The problem is that installations aren't completely standard. Some user have in the Windows Properties starting path the local C:, and others have a network path. The application handles this, but I need to capture the Target drive, and sys(3) doesn't work for this. Is there another sys() function that'll pick up the target?

Looking for something real simple, not API if possible -- this is only very temporary for a usage survey...