Option Explicit

Dim DX8           As New DirectX8
Dim MIDLoader     As DirectMusicLoader8
Dim MIDSeg        As DirectMusicSegment8
Dim MIDPerf       As DirectMusicPerformance8
Dim MIDSegState   As DirectMusicSegmentState8

Dim mtTime        As Long
Dim GetStartTime  As Long
Dim Offset        As Long
Dim MIDInPause    As Boolean

Private Sub cmd_Open_Click()
  Set MIDLoader = Nothing
  Set MIDLoader = DX8.DirectMusicLoaderCreate

  Set MIDPerf = Nothing
  Set MIDPerf = DX8.DirectMusicPerformanceCreate

  Dim dmusAudio As DMUS_AUDIOPARAMS
  MIDPerf.InitAudio Me.hWnd, DMUS_AUDIOF_ALL, dmusAudio, _
        Nothing, DMUS_APATH_DYNAMIC_STEREO, 128
  MIDPerf.SetMasterAutoDownload True
  MIDPerf.AddNotificationType DMUS_NOTIFY_ON_SEGMENT

  CDialog_Open.Filter = "Midi-Segment Files (*.sgt)|*.sgt"
  CDialog_Open.FileName = vbNullString
  CDialog_Open.InitDir = App.Path
  CDialog_Open.ShowOpen

  If CDialog_Open.FileName <> vbNullString Then
    Set MIDSeg = MIDLoader.LoadSegment(CDialog_Open.FileName)
    MIDSeg.SetStartPoint 0
    cmd_Play.Enabled = True
  Else
    Exit Sub
  End If
End Sub

Private Sub cmd_Play_Click()
  MIDSeg.SetStartPoint 0
  If chk_Loop.Value = vbChecked Then
    MIDSeg.SetRepeats -1
  Else
    MIDSeg.SetRepeats 0
  End If
  Set MIDSegState = MIDPerf.PlaySegmentEx( _
        MIDSeg, DMUS_SEGF_DEFAULT, 0)

  cmd_Open.Enabled = False
  cmd_Play.Enabled = False
  cmd_Pause.Enabled = True
  cmd_Stop.Enabled = True

  Timer1.Enabled = True

  MIDInPause = False
End Sub

Private Sub cmd_Pause_Click()
  On Error GoTo ErrOut

  If MIDPerf.IsPlaying(MIDSeg, MIDSegState) = True Then
    MIDInPause = True
    Timer1.Enabled = False
    mtTime = MIDPerf.GetMusicTime()
    GetStartTime = MIDSegState.GetStartTime()
    MIDPerf.StopEx MIDSeg, 0, 0
  Else
    Offset = mtTime - GetStartTime
    MIDSeg.SetStartPoint Offset
    Set MIDSegState = MIDPerf.PlaySegmentEx(MIDSeg, 0, 0)
    MIDInPause = False
    Timer1.Enabled = True
  End If
  Exit Sub

ErrOut:
    MsgBox "Das Lied wurde auf Grund eines Fehlers angehalten."
    cmd_Stop_Click
End Sub

Private Sub cmd_Stop_Click()
  MIDPerf.StopEx MIDSeg, 0, 0

  cmd_Play.Enabled = True
  cmd_Pause.Enabled = False
  cmd_Stop.Enabled = False
  cmd_Open.Enabled = True

  Timer1.Enabled = False

  MIDInPause = False
End Sub

Private Sub cmd_Close_Click()
  If MIDSeg Is Nothing Then
    End
  Else
    If MIDPerf.IsPlaying(MIDSeg, MIDSegState) Then
      MIDPerf.StopEx MIDSeg, 0, 0
    End If

    Set MIDSegState = Nothing
    Set MIDPerf = Nothing
    Set MIDSeg = Nothing
    Set MIDLoader = Nothing
    Set DX8 = Nothing

    End
  End If
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, _
      UnloadMode As Integer)
  cmd_Close_Click
End Sub

Private Sub Timer1_Timer()
  If MIDInPause Then Exit Sub

  If MIDPerf.IsPlaying(MIDSeg, MIDSegState) = False Then
        Timer1.Enabled = False
        cmd_Play.Enabled = True
        cmd_Pause.Enabled = False
        cmd_Stop.Enabled = False
        cmd_Open.Enabled = True
  End If
  
End Sub