box "Hello World!") <font color=orange>;; user presses "OK" button</font>
T
RDNZL-USER 8 > (message-box "Hello World!") <font color=orange>;; user presses "Cancel" button</font>
NIL
</pre>

(Note: All examples shown here are included in the <code>examples</code> folder of the distribution.)
<p>
For a more interesting example which interacts with custom .NET code
and demonstrates callbacks into Lisp consider the .NET library
<code>AproposGUI.dll</code> (put it into your Lisp's application folder or <a href="