>I searched it again for MSWinSck.OCX and did not find it. I am running Windows 2000. I do have MSWinsock.dll in the System32 folder.

"The program works fine with Windows 98/2000 but it will not work with Windows NT/XP"

Looks like the ProgID's differ. For XP, I guess you need the .1 on the end of the ProgID. I do not have easy access to VFP on NT4 at the moment to test that platform.