WinMove..
[autoit]#include <ButtonConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#Region ### START Koda GUI section ### Form=
$Form1 = GUICreate("Form1", 440, 158, 192, 124)
$Button1 = GUICtrlCreateButton("Button2", 112, 32, 97, 49, $WS_GROUP)
GUISetState(@SW_SHOW)
#EndRegion ### END Koda GUI section ###
While 1
$nMsg = GUIGetMsg()
Switch $nMsg
Case $GUI_EVENT_CLOSE
Exit
Case $Button1
WinMove("Form1", "", 500, 200, 800, 600)
EndSwitch
WEnd