Hi Arnd -
Actually, that is the API we have been using. It works just fine in 32 and the IDE. The issue is that I cannot close the application after getting the handle. I had seen a discussion with Chris and Bruce about getting handles in 64 bit to see if you app is running. So, I tried CreateMutex hoping it would help, but I cannot close the other application in 64 bit no matter how I grab the handle, it seems.
Really, I need to find a way for Send( handle, 16, 0, 0 ) or another function to close that app.
Thanks,
Tom