Hello, Brian

so what exactly are you looking for? example of searching that
richtextbox or resizing form?
im sure nobody has the will to make programs for you but surely
someone may help if you have precise questions.

sorry for my english:P

Hi,
I think you are looking for something like below:
static int previndex;
private void button1_Click(object sender, System.EventArgs e)
        {
            for(int lineno = 0;lineno < richTextBox1.Lines.GetLength(0);lineno++)
            {
                previndex = richTextBox1.Find("one",previndex,RichTextBoxFinds.WholeWord
);
                int richtextboxlineno =
richTextBox1.GetLineFromCharIndex(richTextBox1.Find("one",previndex,RichTextBoxFinds.WholeWord  ));
                if (previndex ==0 )
                {
                    previndex++;
                }
                richTextBox2.AppendText(richTextBox1.Lines[richtextboxlineno]);
            }
        }