title: WPF Window size not affected by TabTip keyboard
body: <p>I have a WPF application running on a Windows 8.1 tablet. the application is using the following method to show the virtual keyboard:</p>
  
  <pre><code>public static void OpenKeyboard()
  {
      ProcessStartInfo startInfo =
          new ProcessStartInfo(@"C:\Program Files\Common Files\Microsoft Shared\ink\TabTip.exe")
          {
              WindowStyle = ProcessWindowStyle.Hidden
          };
      Process.Start(startInfo);
  }
  </code></pre>
  
  <p>However, the size of the active window that the keyboard is displayed on top of doesn't change accordingly, meaning that if I have a ScrollViewer surrounding all the elements of my window it doesn't respond to the keyboard.<br>
  Is there any way to make my windows aware of the keyboard presence?<br>
  <strong>Update</strong><br>
  Tried registering to the <code>SizeChanged</code> event of the window but it's not raised when the keyboard pops up.</p>