Determines whether the specified application is not responding
_WinAPI_IsHungAppWindow ( $hWnd )
|$hWnd||Handle to the window.|
|True:||the window stops responding.|
|False:||the window is responding.|
An application is considered to be not responding if it is not waiting for input, is not in startup processing,
and did not respond to messages within the internal timeout period of 5 seconds.
Search IsHungAppWindow in MSDN Library.