rom the database
associated with <I>tkwin</I>'s main window.  If there is an option
for <I>tkwin</I> that matches the given <I>name</I> or <I>class</I>,
then it is returned in the form of a <A HREF="GetUid.html">Tk_Uid</A>.  If multiple options
match <I>name</I> and <I>class</I>, then the highest-priority one
is returned.  If no option matches, then NULL is returned.
<P>
<B>Tk_GetOption</B> caches options related to <I>tkwin</I> so that
successive calls for the same <I>tkwin</I> will execute much more
quick