Need help with flash window DLL

[quick_sliver007]

here is the code I have.

$a = DllOpen("user32.dll")
$gui = GUICreate("", 200, 200)
;Declare Function FlashWindow Lib "user32" Alias "FlashWindow"
;(ByVal hwnd As Long, ByVal bInvert As Long) As Long
GUISetState()
While 1
    $msg = GUIGetMsg()
    Select
        Case $msg = -3
            Exit
    EndSelect
    Sleep(100)
    DllCall($a, "int", "FlashWindow", "int", $gui, "long", "TRUE")
WEnd

I am just tring to learn how to do some of the dlls and I thought that this one would be useful. For more info on this dll then go here. http://www.mentalis.org/apilist/Flashwindow.shtml or http://msdn.microsoft.com/library/default....flashwindow.asp Thank you for any help I get on this.