title: CSS Active Button
body: <p>I have the html code </p>
  
  <pre><code>asp:Button ID="btnStartExportRPT" EnableTheming="true" CssClass="ButtonFilterSelectionL"
                                      Text="&lt;%$ Resources:GlobalResources, cmdStartExecute %&gt;" runat="server"/&gt;
  </code></pre>
  
  <p>and I have the css</p>
  
  <pre><code>.ButtonFilterSelectionL
  {
      font-family: Segoe UI, Verdana;
      font-size: 13px;
      font-weight:lighter;
      color: #999999;
      vertical-align:middle;
  }
  .ButtonFilterSelectionL:active
  {
      font-family: Segoe UI, Verdana;
      font-size: 13px;
      font-weight:lighter;
      color: #005C8B;
      vertical-align:middle;
  }
  </code></pre>
  
  <p>and in my C# code I have defined after some functions </p>
  
  <pre><code> btnStartExportRPT.Enabled = true;
  </code></pre>
  
  <p>I want to know how can I use the <code>.ButtonFilterSelectionL:active</code> css?</p>