void BlitBitmapOnBackground(Bitmap *, Bitmap *, int, int, int, int, int, int);
void DrawSimpleBlackLine(Bitmap *, int, int, int, int);
void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);
void BlitBitmapOnBackground(Bitmap *, Bitmap *, int, int, int, int, int, int);
void DrawSimpleBlackLine(Bitmap *, int, int, int, int);
void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);