[Tutor] GUI new project

[Alan Gauld]

"Joe Cox" <jgcox39 at highstream.net> wrote
> As a new guy, I was trying to write a simple unit conversion
> program in Tk. I got this error message:TclError: unknown option 
> "-command"

Which says that you are using an unknown option command...

ie. Listboxes don't have a command option.

HTH,

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld