confine pointer and keyboard events to a Tk window sub-tree
The Byzi extension for Tk provides a simple means to
block keyboard, button and pointer events from Tk widgets, while
overriding the widget's cursor with a configurable busy cursor.

The Byzi extension is based on the Tk 8.6 busy command sources.

Maintainer: Stuart Cassoff <stwo@users.sourceforge.net>

WWW: http://www3.bell.net/stwo/index.html
