http://www.reghardware.co.uk/2008/01/09/ces_usb_3_revealed/
Wow, didn't know that adding [Browsable(true), EditorBrowsable(EditorBrows... new public event EventHandler TextChanged { add {base.TextChanged += value;} remove {base.TextChanged -= value;} } and private void txtbox1_TextChanged(object sender, EventArgs e) {base.OnTextChanged(e);} Actually gives a textbox based usercontrol a TextChanged event at design time, much nicer than other methods i've used previously ......