[C#] Syntax Highlighting mit einer RichTextBox

// example from: http://www.codestructs.com/2011/11/syntax-highlighting-in-richtextbox_23.html
private void RichTextBox1_TextChanged(object sender, EventArgs e)
{
    int iSelStart = RichTextBox1.SelectionStart;
    int iSelLength = RichTextBox1.SelectionLength;

    string tokens = "(auto|double|int|struct|break|else|long|switch|case|enum|register|typedef|char|extern|return|union|const|float|short|unsigned|continue|for|signed|void|default|goto|sizeof|volatile|do|if|static|while)";

    Regex rex = new Regex(tokens);

    MatchCollection mc = rex.Matches(RichTextBox1.Text);

    int iStart = RichTextBox1.SelectionStart;

    foreach (Match m in mc)
    {
        int iStartIndex = m.Index;
        int iStopIndex = m.Length;

        RichTextBox1.Select(iStartIndex, iStopIndex);
        RichTextBox1.SelectionColor = Color.Blue;
        RichTextBox1.SelectionStart = iStart;
        RichTextBox1.SelectionColor = Color.Black;
    }

    RichTextBox1.SelectionStart = iSelStart;
    RichTextBox1.SelectionLength = iSelLength;
}

Weiterführende Beispiele:

• CodeTextBox
• Syntax Highlighting in RichTextBox Control – Part 2