Attach a guictrl to an other autoit gui

[wakillon]

Hi community !

I try since yesterday to add a basic guictrllabel to an other autoit gui created by another process but nothing work...

#include <GUIConstantsEx.au3>

If WinExists ( "Title1" ) Then
    $_Handle = WinGetHandle ( "Title1", "" ) 
    ;GUISwitch ( $_Handle )
    ;$_WinActivate = WinActivate ( $_Handle, "" )
   ; WinWaitActive ( $_Handle, "" )
    GUISetState ( @SW_ENABLE, $_Handle )
    $_Label1 = GUICtrlCreateLabel ( 'Label1', 10, 10, 200, 20 )
    GUICtrlSetState ( $_Label1, $GUI_SHOW )
   ; ControlShow ( $_Handle, "", $_Label1 )
    GUISetState ( @SW_SHOW , $_Handle )
EndIf

How attach this guictrl to the gui ?

I have try differents way but unsuccessfully !

Should i modify the style or extended style of the gui ?

Or it is impossible ?

[AdmiralAlkex]

You can't just mess around with external windows like that. Try