Easily Create Your Own Parser

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using System.Text.RegularExpressions;

namespace TokenIcer
{
    public class ColorRichTextBox : System.Windows.Forms.RichTextBox
    {
        private static bool m_bPaint = true;
        private int m_nContentLength = 0;
        private string m_strLine = "";
        private int m_nLineLength = 0;
        private int m_nLineStart = 0;
        private int m_nLineEnd = 0;
        private int m_nCurSelection = 0;

        protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            if (m.Msg == 0x00f)
            {
                if (m_bPaint)
                    base.WndProc(ref m);
                else
                    m.Result = IntPtr.Zero;
            }
            else
                base.WndProc(ref m);
        }

        protected override void OnTextChanged(EventArgs e)
        {
            m_nContentLength = this.TextLength;

            int nCurrentSelectionStart = SelectionStart;
            int nCurrentSelectionLength = SelectionLength;

            m_bPaint = false;

            m_nLineStart = nCurrentSelectionStart;
            while ((m_nLineStart > 0) && (Text[m_nLineStart - 1] != '\n'))
                m_nLineStart--;

            m_nLineEnd = nCurrentSelectionStart;
            while ((m_nLineEnd < Text.Length) && (Text[m_nLineEnd] != '\n'))
                m_nLineEnd++;

            m_nLineLength = m_nLineEnd - m_nLineStart;
            m_strLine = Text.Substring(m_nLineStart, m_nLineLength);

            //ProcessLine();

            m_bPaint = true;
            //base.OnTextChanged(e);
        }

        private void ProcessLine()
        {
            int nPosition = SelectionStart;
            SelectionStart = m_nLineStart;
            SelectionLength = m_nLineLength;
            SelectionColor = Color.Black;

            Regex r = new Regex("[0-9]+");
            Match m = r.Match(m_strLine);

            if (m.Success && m.Length > 0)
            {
                int nStart = m_nLineStart + m.Index;
                int nLength = m.Length;
                SelectionStart = nStart;
                SelectionLength = nLength;
                SelectionColor = System.Drawing.Color.Red;
            }



            SelectionStart = nPosition;
            SelectionLength = 0;
            SelectionColor = Color.Black;
            m_nCurSelection = nPosition;
        }
    }
}