You want forms inside of forms? Of course we can do that! #include <ButtonConstants.au3> #include <EditConstants.au3> #include <GUIConstantsEx.au3> #include <WindowsConstants.au3> #include <WinAPI.au3> Global $frmMain = GUICreate("Main GUI", 768, 480, -1, -1, BitOR($WS_SIZEBOX, $WS_MAXIMIZEBOX, $WS_MINIMIZEBOX, $WS_CLIPCHILDREN)) Global $inpMainInput = GUICtrlCreateInput("Input1", 10, 10, 100, 20) Global $btnMainButton = GUI