Pointer in drag'ndrop ?

["Florent. Devin" <Florent Devin lifl fr>]

Hi,
How can I pass a pointer in my dnd function ?
You have to use gtk_selection_data_set function, but how can I put
a pointer in the data field ?
I use this function to pass string,

void source_in_connector_get (GtkWidget *widget,
	GdkDragContext *context,
	GtkSelectionData *selection_data,
	guint info,
	guint time,
	gpointer data)
{
.../...	
	gtk_selection_data_set (selection_data, selection_data->target, 8,
data, (gint) (strlen (data)));
.../...
}
But in this function my data is a pointer to an object, so how can I
pass
something different ?

-- 
Florent DEVIN