checking $arg for certain characters

[zippy]

i working on a tcl that i dont want certain ascii character like high ascii in
$arg but i wish to warn the inputer that the arg contains hi ascii or other ascii characters so how can i perfrom this check?

John

[caesar]

Have a look on this post.

[zippy]

yeap i finally worked it.

Regsub
and regexp

just incase someone needs the functions

John