Titlebar: module{	PATH: con "/dis/lib/titlebar.dis"; 	Resize,	Hide,	Help,	OK,	Popup,	Plain:		con 1 << iota;	Appl:		con Resize | Hide; 	init:	fn();	new:		fn(top: ref Tk->Toplevel, buts: int): chan of string;	minsize:	fn(top: ref Tk->Toplevel): Draw->Point;	title:		fn(top: ref Tk->Toplevel): string;	settitle:	fn(top: ref Tk->Toplevel, title: string): string;	sendctl:	fn(top: ref Tk->Toplevel, c: string);};