A purist should be worried about touching control variables. Hmmm.

Jordan

Did you try this?

public class MyRichText : RichTextBox
{
public MyRichText()
{
//by setting Double Buffer, the painting will finish before its redenered
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
SetStyle(ControlStyles.ResizeRedraw, true);
SetStyle(ControlStyles.Selectable, true);

    }
}

Jordan