+ if ((gdk_event->state == 0) &&
+ (((listbox->GetWindowStyleFlag() & wxLB_MULTIPLE) != 0) ||
+ ((listbox->GetWindowStyleFlag() & wxLB_EXTENDED) != 0)) )
+ {
+ listbox->m_blockEvent = TRUE;
+
+ int i;
+ for (i = 0; i < (int)listbox->GetCount(); i++)
+ if (i != sel)
+ gtk_list_unselect_item( GTK_LIST(listbox->m_list), i );
+
+ listbox->m_blockEvent = FALSE;
+
+ return false;
+ }
+