for anyone who is interested in how TIP 280 (extended [info frame],
http://www.tcl.tk/cgi-bin/tct/tip/280.html) and TIP 290 (custom
exception handlers, http://www.tcl.tk/cgi-bin/tct/tip/290.html) work -
I have built Tclkits with these TIP's integrated.
They can be downloaded from
http://e-lehmann.de/index.php/tcltk/tclkit/. It's for a sneak preview
on these features and testing/using without the need to patch and
recompile Tcl.
Eckhard