[fpc-pascal] gdk_window_get_frame_extents

[Airr]

Hello, all.

I'm trying to get the current position and size of a GTK2 gtkwindow
using the following:

===
function configure_event(widget: PGtkWidget; event : PGdkEvent; data  :
gpointer):gboolean;cdecl;

var
  grect :PGdkRectangle;

begin
  gdk_window_get_frame_extents(GDK_WINDOW(widget^.window), at grect);


  configure_event := True;
end;
===

The signal is attached to the window via:

===
g_signal_connect (G_OBJECT (window), 'configure_event',
                              G_CALLBACK (@configure_event), NULL);
===

Executing the program results in:

An unhandled exception occurred at $0000004B :
EAccessViolation : Access violation
  $0000004B

FPC version is: 
Free Pascal Compiler version 2.0.4 [2007/02/02] for i386

OS is: Kubuntu 7.04

Any thoughts on why this is causing the AV?

Thanks!

AIR.
-- 
"Programming is like Poetry. Sometimes the words just escape you..."
-me, to my manager.