interface scrollbar : widget { 
\c{\fbox{scrollbar}}
scrollbar(char* p, char* options = ""); scrollbar(widget* w, char* p, char* options = ""); void orient(char* opts="vertical"); xview(widget* w);
\c{// install widget to scroll}
yview(widget* w);
\c{// install widget to scroll}
};

slide: The scrollbar class