private void RegularExpression_TextChanged(object sender, EventArgs e)
{
// On a Paste, de-RTF the text and move the cursor back to the previous position.
if (RegularExpression.UndoActionName == pasteActionString)
{
int cursorPosition = RegularExpression.SelectionStart;
//...get the text (not the RTF) and then clear and set it, to clear formatting information
string text = RegularExpression.Text;
RegularExpression.Clear();
RegularExpression.Text = text;
//...place the cursor at the correct position and scroll it into view
RegularExpression.Select();
RegularExpression.Select(cursorPosition, 0);
RegularExpression.ScrollToCaret();
}
RunExpression();
}