C#

FieldInfo fi = typeof(Control).GetField( "EventPaint", BindingFlags.Static | BindingFlags.NonPublic );
object eventPaint = fi.GetValue( this );

this.Paint += new PaintEventHandler(Form1_Paint);
if( base.Events[eventPaint] == null )
{
	Debug.WriteLine( "No handlers attached to the Paint event." );
}
else
{
	Debug.WriteLine( "One or more handler is attached to the Paint event." );
}

Josh Smith wrote:

Use a little reflection to get the field which represents the Paint event, then (from within your control) access the protected Events property.

<br />
private PaintEventHandler myPaint;<br />
<br />
public new event PaintEventHandler Paint<br />
{<br />
    add<br />
    {<br />
        base.Paint += value;<br />
        myPaint += value;<br />
    }<br />
<br />
    remove<br />
    {<br />
        base.Paint -= value;<br />
        myPaint -= value;<br />
    }<br />
}<br />
<br />
protected override void OnPaint(PaintEventArgs e)<br />
{<br />
    if (myPaint != null)<br />
        base.OnPaint(e);<br />
    else<br />
        MyDefaultPainting(e);<br />
}<br />