Public Overridable Sub PlayAudio() 

Dim instance As AnnAutomation
 
instance.PlayAudio()

public virtual void PlayAudio()

public:
virtual void PlayAudio(); 

Public Sub AnnAutomation_PlayAudio(ByVal automation As AnnAutomation, ByVal audioFilename As String)
   ' make sure no objects are selected
   automation.SelectNone()
   ' see if we can play audio (should say no)
   If (Not automation.CanPlayAudio) Then
      MessageBox.Show("Cannot play audio")
   End If

   ' add an audio object and select it
   Dim audio As AnnAudioObject = New AnnAudioObject()
   audio.Bounds = New AnnRectangle(100, 100, 200, 200, AnnUnit.Pixel)
   automation.Container.Objects.Add(audio)
   automation.StartEditing(audio, False)

   ' see if we can play audio 
   ' (should say no, since the audio object does not have an audio file in the filename yet)
   If (Not automation.CanPlayAudio) Then
      MessageBox.Show("Cannot play audio")
   End If

   ' set up the filename for this audio object
   audio.FileName = audioFilename

   ' see if we can play audio (should play it now)
   If automation.CanPlayAudio Then
      automation.PlayAudio()
   End If
End Sub

public void AnnAutomation_PlayAudio(AnnAutomation automation, string audioFilename)
{
   // make sure no objects are selected
   automation.SelectNone();
   // see if we can play audio (should say no)
   if(!automation.CanPlayAudio)
      MessageBox.Show("Cannot play audio");

   // add an audio object and select it
   AnnAudioObject audio = new AnnAudioObject();
   audio.Bounds = new AnnRectangle(100, 100, 200, 200, AnnUnit.Pixel);
   automation.Container.Objects.Add(audio);
   automation.StartEditing(audio, false);

   // see if we can play audio 
   // (should say no, since the audio object does not have an audio file in the filename yet)
   if(!automation.CanPlayAudio)
      MessageBox.Show("Cannot play audio");

   // set up the filename for this audio object
   audio.FileName = audioFilename;

   // see if we can play audio (should play it now)
   if(automation.CanPlayAudio)
      automation.PlayAudio();
}