+void
+wxRendererGeneric::DrawComboBoxDropButton(wxWindow *win,
+                                          wxDC& dc,
+                                          const wxRect& rect,
+                                          int WXUNUSED(flags))
+{
+    dc.SetBrush(wxBrush(win->GetBackgroundColour()));
+    dc.SetPen(wxPen(win->GetBackgroundColour()));
+    dc.DrawRectangle(rect);
+
+    wxPoint pt[] =
+    {
+        wxPoint(0,0),
+        wxPoint(rect.width, 0),
+        wxPoint(rect.width/2, rect.height - 2)
+    };
+    dc.SetBrush(wxBrush(win->GetForegroundColour()));
+    dc.SetPen(wxPen(win->GetForegroundColour()));
+    dc.DrawPolygon(WXSIZEOF(pt), pt, rect.x, rect.y);
+}
+
+
+// ----------------------------------------------------------------------------
+// A module to allow cleanup of generic renderer.
+// ----------------------------------------------------------------------------
+
+class wxGenericRendererModule: public wxModule
+{
+DECLARE_DYNAMIC_CLASS(wxGenericRendererModule)
+public:
+    wxGenericRendererModule() {}
+    bool OnInit() { return true; };
+    void OnExit() { wxRendererGeneric::Cleanup(); };
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxGenericRendererModule, wxModule)
+