void FillRectangle(Bitmap *, int, int, int, int, Pixel);
void ClearRectangle(Bitmap *, int, int, int, int);
void ClearRectangleOnBackground(Bitmap *, int, int, int, int);
void FillRectangle(Bitmap *, int, int, int, int, Pixel);
void ClearRectangle(Bitmap *, int, int, int, int);
void ClearRectangleOnBackground(Bitmap *, int, int, int, int);