Sample: dhtmlxWindows User-Button dhtmlxWindows main page
X
Select Button
Select Action
 
<head>
    ...
    <!-- attaching css containing user-button styles -->
    <link rel="stylesheet" type="text/css" href="codebase/skins/dhtmlxwindows_dhx_userbutton.css">
</head>
<script>
 
    var dhxWins = new dhtmlXWindows();
    ...
    // adding "Tray" user-button
    dhxWins.window(id).addUserButton("dock", 0, "Dock Window", "dock");
    // attaching event to "Tray" button
    dhxWins.window(id).button("dock").attachEvent("onClick", function(){
        alert('The window wants to be docked.');
    });
</script>