bool Combine(long x, long y, long width, long height, wxRegionOp op);
bool Combine(const wxRegion& region, wxRegionOp op);
bool Combine(const wxRect& rect, wxRegionOp op);
bool Combine(long x, long y, long width, long height, wxRegionOp op);
bool Combine(const wxRegion& region, wxRegionOp op);
bool Combine(const wxRect& rect, wxRegionOp op);