 
  9 : Invalid parameter count
 
Function CaptureScreen can return exit code : 
 
  0 : OK
 10 : Capture screen other error
 11 : File name not specified
 12 : GetWindowDC fail
 13 : CreateCompatibleDC fail
 14 : GetSystemMetrics fail
 15 : CreateCompatibleBitmap fail  (unsucceful saving a screen to the destination path) 
 16 : BitBlt fail
 17 : BMP / image processing exception
 20 : Save output file exception
 21 : Create directory fail
 
 
Function ShowScreenCapturedAlert can returns
 
  0 : OK
 30 : Show alert msg other error
 31 : Show alert msg exception
 
