[Yashied]

Код:

#Include <GUIMenu.au3>
#Include <WindowsConstants.au3>

Run(@SystemDir & '\Notepad.exe')

$hWnd = WinWaitActive('[CLASS:Notepad]', '', 3)
If Not $hWnd Then
    Exit
EndIf

$hMenu = _GUICtrlMenu_GetMenu($hWnd) ; Main menu
$hMenu = _GUICtrlMenu_GetItemSubMenu($hMenu, 0) ; "File"
$ID = _GUICtrlMenu_GetItemID($hMenu, 1) ; "File - Open"

_SendMessage($hWnd, $WM_COMMAND, $ID, 0)