- virtual wxBitmap DoGetBitmap(State which) const;
- virtual void DoSetBitmap(const wxBitmap& bitmap, State which);
- virtual wxSize DoGetBitmapMargins() const;
- virtual void DoSetBitmapMargins(wxCoord x, wxCoord y);
- virtual void DoSetBitmapPosition(wxDirection dir);
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- class wxButtonImageData *m_imageData;