void MyListCtrl::OnColClick(wxListEvent& event)
{
int col = event.GetColumn();
- SetColumnImage(col, 0);
+
+ // set or unset image
+ static bool x = false;
+ x = !x;
+ SetColumnImage(col, x ? 0 : -1);
wxLogMessage( wxT("OnColumnClick at %d."), col );
}