DirectX callback problem

kmesse_at_lycos.com
Date: 02/11/05 

Date: 11 Feb 2005 03:24:01 -0800

Conext: Writing a program that will play an array of wav files in
sequence. I use
DSNotification to alert me when one is done. I know very little about
this and am using a tutorial program, but the tutorial writer hasn't
delved this deeply into it.

In the module, this is triggered when a sound stops:

    Public Function DXCallback(ByVal eventid As Long) As Integer
      'Find the sound that caused this event to be triggered
      For iLoop = 4 To 7
          If Sound(iLoop).DSNotification = eventid Then
            Exit For
          End If
      Next

      DXCallback = iLoop ' Return the ID
    End Function

I'm supposed to get the element of the array that triggered it. On the
form:

Private Sub DirectXEvent_DXCallback(ByVal eventid As Long)
  Dim RetID As Integer
  'This event is triggered when a sound buffer reaches the position
specified
        by DSPosition

    RetID = DSound.DXCallback(eventid) ' get which sound triggered the
event

    If LastSequence = NextSequence Then Exit Sub ' exit if it's same #

    DSound.StopSound Sound(LastSequence).SoundID ' stop current sound
    DSound.PlaySound Sound(NextSequence).SoundID ' play the next one
    LastSequence = NextSequence
End Sub

When I run this, and debug.print the value of retID, it always returns
all 3 elements:

0
1
2

0
1
2

Instead of the one selected.

can anyone help? How does this callback thing work? Are there any
tutorials on the web that go into this depth?

Kevin

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