+ virtual bool AppendBitmapColumn( const wxString &label, unsigned int model_column );
+ virtual bool AppendTextColumn( const wxBitmap &label, unsigned int model_column );
+ virtual bool AppendToggleColumn( const wxBitmap &label, unsigned int model_column );
+ virtual bool AppendProgressColumn( const wxBitmap &label, unsigned int model_column );
+ virtual bool AppendDateColumn( const wxBitmap &label, unsigned int model_column );
+ virtual bool AppendBitmapColumn( const wxBitmap &label, unsigned int model_column );
+