Other FLTK widget opcodes are FLbox, FLbutBank, FLbutton, FLprintk, FLprintk2, and FLvalue,
Opcodes one can use to modify FLTK widget appearance are FLcolor2, FLcolor, FLhide, FLlabel, FLsetAlign, FLsetBox, FLsetColor2, FLsetColor, FLsetFont, FLsetPosition, FLsetSize, FLsetText, FLsetTextColor, FLsetTextSize, FLsetTextType, FLsetVal, FLsetVal_i, and FLshow.
The general FLTK widget-related opcodes are FLgetsnap, FLloadsnap, FLrun, FLsavesnap, FLsetsnap, and FLupdate.
The opcode for the FLTK slider bank is FLslidBnk.