SetWinEventHook(0x000A, 0x000B, 0, RegisterCallback("MyFunc", "F"),0,0,0)
Thwnd := WinExist("ahk_class Notepad")
return

MyFunc(hWinEventHook, event, hwnd) {
    Global
    If (hwnd = Thwnd)
    {
        If (event = 0x000A)
            ToolTip EVENT_SYSTEM_MOVESIZESTART
        Else If (event = 0x000B)
            ToolTip EVENT_SYSTEM_MOVESIZEEND
    }
}

SetWinEventHook(eventMin, eventMax, hmodWinEventProc, lpfnWinEventProc, idProcess, idThread, dwFlags)
{
   return DllCall("SetWinEventHook" , UInt, eventMin, UInt, eventMax
                                    , Ptr, hmodWinEventProc, Ptr, lpfnWinEventProc
                                    , UInt, idProcess, UInt, idThread
                                    , UInt, dwFlags, Ptr)
}

EVENT_OBJECT_LOCATIONCHANGE = 0x800B