Open regedit. ( Click Start --> Run and type regedit and hit ok).

Navigate to HKEY_CURRENT_USER\Software\Policies\Microsoft\

Right Click on Microsoft Folder and then New--> Key.

A new folder will be added. Named it as WindowsMediaPlayer.

Now Right Click in the right Panel and then New-->String Value.

Name this value as TitleBar.

Now double click on it and type any text you want to display.

Click ok and hit F5 to refresh the registry.