title: RadWindow Modal Ajax Popup hide and show from code behind
body: <p>I really need some help with this. I need to, using a RadWindow control, pop up a modal window containing a dynamically populated CheckBoxList based on user selection on dropdownlist changed. Please help with any sample or information to help me achieve this. </p>
  
  <pre><code> &lt;telerik:RadWindow ID="UserListDialog" runat="server" Title="Editing record" Width="250"         Height="536" VisibleOnPageLoad="false" Modal=true Behaviors="Minimize, Move, Resize,Maximize" Left="580" Top="-8" EnableShadow="true"&gt;
              &lt;ContentTemplate&gt;
                  &lt;div style="text-align: center;"&gt;
   LIST OF STUFF TO DISPLAY 
                  &lt;/div&gt;
              &lt;/ContentTemplate&gt;
          &lt;/telerik:RadWindow&gt;
  </code></pre>