; Identify the Notepad window that contains the text "this one" and get a handle to it ; Change into the WinTitleMatchMode that supports classnames and handles AutoItSetOption("WinTitleMatchMode", 4) ; Get the handle of a notepad window that contains "this one" $handle = WinGetHandle("classname=Notepad", "this one") If @error Then MsgBox(4096, "Error", "Could not find the correct window") Else ; Send some text directly to this window's edit control ControlSend($handle, "", "Edit1", "AbCdE") EndIf