[vtkusers] Simple Question about TCL

[lappadj at libero.it]

Hi,
i have installed the tcl tools,but i don't know how to set the 
directory in the script to read the file.For example 

catch {load vtktcl}
if { [catch {set VTK_TCL $env(VTK_TCL)}] != 0} { set VTK_TCL 
"../../examplesTcl" }
if { [catch {set VTK_DATA $env(VTK_DATA)}] != 0} { set VTK_DATA 
"../../../vtkdata" }

i don't know how to modify this path in tcl script,wich editor i must 
use?I normally work in Visual C++.
Thanks you
Massimiliano La Paglia