C#

[C#]
public override int Read(
   [In,Out] byte[] array,
   int offset,
   int count
);

Parameters
*array 
 When this method returns, contains the specified byte array with the values between offset and (offset + count - 1) replaced by the bytes read from the current source. 
*offset 
 The byte offset in array at which to begin reading. 
*count 
 The maximum number of bytes to read. 
Return Value
 The total number of bytes read into the buffer. This might be less than the number of bytes requested if that number of bytes are not currently available, or zero if the end of the stream is reached.

public delegate void ControlButtonPressedHandle(object sender, EventArgs e);
public event ControlButtonPressedHandle ButtonPressed;

protected virtual void OnButtonPressed(EventArgs e)
{
    if (ButtonPressed != null) 
	ButtonPressed(this, e);
}

private void button1_Click(object sender, System.EventArgs e)
{
    OnButtonPressed(new EventArgs());
}

myControl.ButtonPressed += new ControlButtonPressedHandle(myFunction);

void myFunction(object sender, EventArgs e) {
   // treat here what ever you want
}