+ if ((gdk_event->state == 0) &&
+ (((listbox->GetWindowStyleFlag() & wxLB_MULTIPLE) != 0) ||
+ ((listbox->GetWindowStyleFlag() & wxLB_EXTENDED) != 0)) )
+ {
+ if (listbox->IsSelected(sel))
+ {
+ gtk_list_unselect_item( GTK_LIST(listbox->m_list), sel );
+ return true;
+ }
+ }
+