Ed,
VFP is only case sensitive in the DECLARE, after that you can use any case in VFP to call the API function:
ExitProcess()
exitprocess()
EXITPROCESS()
eXITpROCESS()
will all work equally well in the VFP code.
DECLARE INTEGER ExitProcess IN Win32API ;
INTEGER ExitCode
>Note: ExitProcess is CASE SENSITIVE in both its declaration and in referencing it.