# Function Reference

# _WinAPI_GetTopWindow

Retrieves a handle to the child window at the top of the Z order

#include <WinAPISysWin.au3>
_WinAPI_GetTopWindow ( $hWnd )

## Parameters

$hWnd | Handle to the parent window whose child windows are to be examined. If this parameter is 0, the function returns a handle to the window at the top of the Z order.

## Return Value

Success: | Handle to the child window at the top of the Z order. If the specified window has no child windows, the return value is 0.
Failure: | 0, call _WinAPI_GetLastError() to get extended error information.

## See Also

Search GetTopWindow in MSDN Library.