Call the default window procedure to provide default processing
#include <WinAPISysWin.au3>
_WinAPI_DefWindowProc ( $hWnd, $iMsg, $wParam, $lParam )
$hWnd | Handle to the window procedure that received the message |
$iMsg | Specifies the message |
$wParam | Specifies additional message information |
$lParam | Specifies additional message information |
Search DefWindowProc in MSDN Library.