winfrom如何做一个语法着色控件

本文转载：http://www.cnblogs.com/hexin0614/archive/2012/01/17/2324224.html

本人觉得把KeyWords属性改成如下更好：

private string[] _KeyWords = new string[]
        { 
            "SELECT", "UPDATE", "DELETE", "INSERT", "DROP", "FROM", "WHERE", "ALERT", "CREATE", "TABLE", 
            "VALUES", "NULL", 
            "AND", "OR", "NOT", "IN", "INTO", "UNION", "AS", "IS", 
            "COUNT", "MAX", "MIN", "AVG", 
            "WAIT", "NOWAIT", "WITHOUT", "LOCK", "GROUP", "ORDER", "BY", 
            "JOIN", "LEFT", "RIGHT", "CASE", "WHEN", "ELSE", "END", 
            "COMMIT", "ROLLBACK"
        };

        [CategoryAttribute("KeyWords"), Description("关键字列表")]
        public string[] KeyWords
        {
            get
            {
                return this._KeyWords;
            }
            set
            {
                this._KeyWords = value;
            }
        }