How to get current used color theme of Visual Studio

Question

I'm creating my own IntelliSense Presenter, since Visual Studio2012 support change theme, so I want my background color of the presenter can be auto-changed when the theme been changed. Is there a way to track the theme changes event, or get the current color theme of the Visual Studio?

Answer 1

For VS 2015 this has changed, the solution @Matze has still works but you need to update the GetThemeId() function to check for the version and if it's 14.0 (VS2015) look in a different place in the registry. The way the value is stored has changed also, it's still a string but now contains other values seperated by a '*'. The theme guid is the last value in the list.

if (version == "14.0")
{
   string keyName = string.Format(@"Software\Microsoft\VisualStudio\{0}\ApplicationPrivateSettings\Microsoft\VisualStudio", version);

   using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyName))
   {
      if (key != null)
      {
          var keyText = (string)key.GetValue("ColorTheme", string.Empty);

              if (!string.IsNullOrEmpty(keyText))
              {
                  var keyTextValues = keyText.Split('*');
                  if (keyTextValues.Length > 2)
                  {
                       return keyTextValues[2];
                  }
              }
      }
   }

   return null;
}