Trouble with DirectX.AudioVi deoPlayback.Aud io

[Terry Olsen]

If I have an audio file playing using DirectX.AudioVi deoPlayback.Aud io and I
click the stop button, using the following code:

Private Sub btnStop_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles btnStop.Click
Try
Player.StopWhen Ready()
Catch
End Try
End Sub

Private Sub PlayerStopped(B yVal sender As Object, ByVal e As
System.EventArg s) Handles Player.Stopping
While Player.Stopped = False
'do nothing here. we're waiting for it to stop.
End While
Timer1.Stop()
Try
Player.Dispose( )
Player = Nothing
Catch ex As Exception
End Try
trkPosition.Val ue = 0
lblPosition.Tex t = "0:00"
MsgBox("Made it thru this sub")
End Sub

I get the following exception:

System.AccessVi olationExceptio n was unhandled
Message="Attemp ted to read or write protected memory. This is often an
indication that other memory is corrupt."
Source="Microso ft.DirectX.Audi oVideoPlayback"
StackTrace:
at AudioWndProc(HW ND__* hWnd, UInt32 uMsg, UInt32 wParam, Int32
lParam)
at System.Windows. Forms.UnsafeNat iveMethods.Disp atchMessageW(MS G&
msg)
at
System.Windows. Forms.Applicati on.ComponentMan ager.System.Win dows.Forms.Unsa feNativeMethods .IMsoComponentM anager.FPushMes sageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo pInner(Int32
reason, ApplicationCont ext context)
at
System.Windows. Forms.Applicati on.ThreadContex t.RunMessageLoo p(Int32 reason,
ApplicationCont ext context)
at System.Windows. Forms.Applicati on.Run(Applicat ionContext context)
at
Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.OnRun ()
at
Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.DoApp licationModel()
at
Microsoft.Visua lBasic.Applicat ionServices.Win dowsFormsApplic ationBase.Run(S tring[]
commandLine)
at eDeeJay.My.MyAp plication.Main( String[] Args) in
17d14f5c-a337-4978-8281-53493378c1071.v b:line 81
at System.AppDomai n.nExecuteAssem bly(Assembly assembly, String[]
args)
at System.AppDomai n.ExecuteAssemb ly(String assemblyFile, Evidence
assemblySecurit y, String[] args)
at Microsoft.Visua lStudio.Hosting Process.HostPro c.RunUsersAssem bly()
at System.Threadin g.ThreadHelper. ThreadStart_Con text(Object state)
at System.Threadin g.ExecutionCont ext.Run(Executi onContext
executionContex t, ContextCallback callback, Object state)
at System.Threadin g.ThreadHelper. ThreadStart()

Line 81 referred to in the StackTrace happens to be the "Handles
Player.Stopping " line.

I was using:

Try
Player.Dispose( )
Player = Nothing
Catch ex As Exception
End Try

in the btnPlay_Click event to unload the player and reload and it worked
fine. But I need to unload the player when I click the Stop button. If I
move the Try block back up so it is in the Play button event code, it works
fine again. The MsgBox in the Player.Stopping event fires so I know it's
making it all the way through the code there. But as soon as I click the OK
button in the MsgBox, I get the error above. What gives?