ill ignore mouse button presses.
In this state the <B>disabledforeground</B> and
<B>background</B> options determine how the Button is displayed.
</DD>
</DL>
<DL><DT><A NAME="-underline"><B>-underline</B></A></DT>
<DD>

Specifies the integer index of a character to underline in the label of the button.
0 corresponds to the first character of the text displayed, 1 to the next character,
and so on.
<BR>The binding <B>&lt;Alt-<I>char</I>&gt;</B> is automatically set on the toplevel
of the Button to call Button