oblems with existing Tcl/Tk applications.  Many existing
applications are written with bindings that use &quot;%W&quot;.  Many
library procedures assume that the window name is the access
command.
<P>The <B>itcl::purist</B> variable controls a backward-compatibility
mode.  By default, this variable is &quot;0&quot;, and the window name
can be used as an access command in any context.  Whenever the
<B><A HREF="../TclCmd/unknown.html">unknown</A></B> procedure stumbles across a widget name, it simply
uses &qu