Thank's for the info. The thing I liked best about regular Tk is that programs I wrote years ago originally on NetBSD at home and which worked unchanged also on Win2K at work...those same programs still work fine today, totally unchanged even after I have since switched from NetBSD to Ubuntu at home and have gone from Win2K through WinXP to Vista at work.
What with Win7 looming on the horizon, the idea of having to co-develop all those Perl/Tk scripts yet again for Tkx so as to work on both systems... Well, the prospect is daunting enough as to make me think about just starting over with something totally new. Guess I don't have to do that for a while yet. Whew! Thanks again.