Retrieves the PID of the parent process for the specified process
#include <WinAPIProc.au3>
_WinAPI_GetParentProcess ( [$iPID = 0] )
| $iPID | [optional] The PID of the process. Default (0) is the current process. |
| Success: | The PID of the parent process. |
| Failure: | 0 and sets the @error flag to non-zero. |