This extension allows a system that uses the Tk toolkit over the Tcl interpreter (of at least version 8.0) to work with windows whose shapes are described by other than a simple rectangle.
There is some documentation (as NROFF source) in the doc directory.
There are some demonstrations in the demos directory.
Any bug reports or feature suggestions are welcome; pull requests welcome!
Note that this software should be considered to be of no better than beta quality on Unix and alpha quality on Windows.
(OK, I put this code aside for a bit because I was busy with other things. That "a bit" expanded to become 20 years...)