Tcl is a scripting language quite a bit different from ruby,
tk is a GUI extension to that scripting language that has been
picked up by other scripting languages as well to serve as their
own GUI extension (for more on Tcl/Tk directly, see http://www.tcl.tk).

I could answer this question in Tcl by saying that the tile widget set
in Tk 8.5beta supports comboboxes, however I doubt that Ruby/Tk is that
up-to-date with respect to Tk versions.

Now ComboBox spelled in that way is a BWidget widget (a 'megawidget set'
that is an add on to Tk).  Ruby/Tk at http://rubytk.jurijveresciaka.com/
says you make this by doing:

Tk::BWidget::ComboBox.new(root)

I believe to use this you'll have to get the BWidget extensions
installed to your Tk installation. See e.g.

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/143351

If you can tell me what operating system/distribution you are running on
I could probably help you figure out how to do that.
Feel free to contact me off line if you prefer, as this is probably 
wandering a bit off topic for the list (into the realm of Tcl/Tk from
Ruby).

Ron Fox



lote wrote:
> Hi everbody, i am newest at the Ruby/tk and i want to do something..i
> want to use ComboBox but default tk does not contain combobox control.
> How can i use it ? and What is the difference between TCL and TK ??
> 
> thanks...
>