Insert an audio cd, ignore the autoplay.
Then when you see the tracks press the SCAN button.
Now clicking on a track makes cd not play.

h4. Additional Information
This is the exeption in the log.
9/2/2004 6:08:31 PM Exception: Object reference not set to an instance of an object. System.Windows.Forms at System.Windows.Forms.UnsafeNativeMethods.PeekMessage(MSG& msg, HandleRef hwnd, Int32 msgMin, Int32 msgMax, Int32 remove)
   at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.DoEvents()
   at MediaPortal.D3DApp.Render3DEnvironment()

When you leave it running MP will shutdown later.