Other FLTK widget opcodes are FLbox, FLbutBank, FLbutton, FLprintk, FLprintk2, and FLvalue,
The following opcodes modify FLTK widget appearance:
The general FLTK widget-related opcodes are FLgetsnap, FLloadsnap, FLrun, FLsavesnap, FLsetsnap, and FLupdate.
The opcode for the FLTK slider bank is FLslidBnk.