Public Event ProgressChanged As ProgressChangedEventHandler

Dim instance As BackgroundWorker
Dim handler As ProgressChangedEventHandler

AddHandler instance.ProgressChanged, handler

public event ProgressChangedEventHandler ProgressChanged

public:
event ProgressChangedEventHandler^ ProgressChanged {
    void add (ProgressChangedEventHandler^ value);
    void remove (ProgressChangedEventHandler^ value);
}

/** @event */
public void add_ProgressChanged (ProgressChangedEventHandler value)

/** @event */
public void remove_ProgressChanged (ProgressChangedEventHandler value)

JScript admite el uso de eventos, pero no admite la declaración de eventos nuevos.

' This event handler updates the progress bar.
Private Sub backgroundWorker1_ProgressChanged( _
ByVal sender As Object, ByVal e As ProgressChangedEventArgs) _
Handles backgroundWorker1.ProgressChanged

    Me.progressBar1.Value = e.ProgressPercentage

End Sub

// This event handler updates the progress bar.
private void backgroundWorker1_ProgressChanged(object sender,
    ProgressChangedEventArgs e)
{
    this.progressBar1.Value = e.ProgressPercentage;
}

// This event handler updates the progress bar.
void backgroundWorker1_ProgressChanged( Object^ /*sender*/, ProgressChangedEventArgs^ e )
{
   this->progressBar1->Value = e->ProgressPercentage;
}

// This event handler updates the progress bar.
private void backgroundWorker1_ProgressChanged(Object sender,
    ProgressChangedEventArgs e)
{
    this.progressBar1.set_Value(e.get_ProgressPercentage());
} //backgroundWorker1_ProgressChanged