-    virtual void DrawHeaderButton(wxWindow *win,
-                                  wxDC& dc,
-                                  const wxRect& rect,
-                                  int flags = 0,
-                                  wxHeaderSortIconType sortArrow = wxHDR_SORT_ICON_NONE,
-                                  wxHeaderButtonParams* params=NULL);
+    virtual int DrawHeaderButton(wxWindow *win,
+                                 wxDC& dc,
+                                 const wxRect& rect,
+                                 int flags = 0,
+                                 wxHeaderSortIconType sortArrow = wxHDR_SORT_ICON_NONE,
+                                 wxHeaderButtonParams* params=NULL);