class Fl_Round_Button : public Fl_Button

This object is provided for compatibility with Forms. It acts like a normal button but draws a FL_CIRCLE_BOX. This circle is smaller than the object size and can be surrounded by another box type, although this is FL_NO_BOX by default. down_color() is the color used inside the circle when value() is one, by default this is FL_RED:

Fl_Round_Button(int x,int y,int w,int h,const char *l);

There are two subclasses: