FoxPro code samples (require membership):

Enumerating Processes -- WinNT
http://www.news2news.com/vfp/?example=162
API calls used:
CloseHandle
EnumProcesses
EnumProcessModules
GetLastError
GetModuleBaseName
GetModuleFileNameEx
OpenProcess

Enumerating Processes -- Win9*
http://www.news2news.com/vfp/?example=164
API calls used:
CloseHandle
CreateToolhelp32Snapshot
Process32First
Process32Next

Terminating all running applications from a VFP program
http://www.news2news.com/vfp/?example=243
API calls used:
CloseHandle
GetActiveWindow
GetWindow
GetWindowText
GetWindowTextLength
GetWindowThreadProcessId
IsWindow
IsWindowVisible
OpenProcess
PostMessage
TerminateProcess
The code enumerates not running processes but windows and then obtains process handle for each window found.

Terminating VFP application using the FatalAppExit
http://www.news2news.com/vfp/?example=229
API calls used:
FatalAppExit