That's generally a problem. I can go with multiline, but I must catch enter
and tab, to prevent them from going into RichTextBox message. This is the
code I use to ignore the ENTER and TAB, but it doesn't work. Tab still moves
caret and enter moves it one line. Is there something wrong in this code??

I really appreciate your help.

private void keyDown(object sender, System.Windows.Forms.KeyEventArgs e){

if(e.KeyCode == Keys.Enter ){

e.Handled = true;}

if(e.KeyCode == Keys.Tab){

e.Handled=true;

}