title: Altering existing message on TdxAlertWindowManager
body: <p>I use a piece of code like this to show an alert using the <code>TdxAlertWindowManager</code>.
  This gives me one alert window and in this window there are several messages.
  What I would like to do is to show an alert window with the first line of text and on the same window I would like to put a new text.
  The program is used to connect a computer to some network shares and the message I would like to put looks like:</p>
  
  <pre><code>Connecting drive y: to \\server\foldery
  Connecting drive x: to \\server\folderx
  </code></pre>
  
  <p>and so on for the rest of the shares.
  But I can't figure out how to do it with <code>TdxAlertWindowManager</code></p>
  
  <p>Some years ago when I made the program I used <code>nxAlert</code> from Berg software, but I don't have it available any more. On that it was no problem to do this.</p>
  
  <pre><code>if fAlertWindow = nil then
    dxAlertWindowManager.Show(sHpAlertCaption, AlertText, fIndex).Tag := 1
  else
    begin
      fAlertWindow.MessageList.Add(sHpAlertCaption, AlertText, fIndex);
      fAlertWindow.RestartDisplayTimer;
    end;
  </code></pre>