procedures.
If applications try to manipulate X's grab mechanisms directly,
things will probably break.
<P>
If a single process is managing several different Tk applications,
only one of those applications can have a local grab for a given
display at any given time.  If the applications are in different
processes, this restriction does not exist.
<H3><A NAME="M12">EXAMPLE</A></H3>
Set a grab so that only one button may be clicked out of a group.  The
other buttons are unresponsive to the mouse until the mid