No such file to load -- tk (LoadError)

hello

I just use netbeans instead SciTE because SciTE has some problem with
output
and netbeans don’t has that problem but when I want to make GUI and I
use

require ‘tk’

netbeans show this message

C:\Users\Acer\NetBeansProjects\Fact\lib\main.rb:1: no such file to load
– tk (LoadError)

I install Tcl in drive C:\Tcl
but in cmd it work normally

how to use it :’(