ADO Database C#

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
    public class Form1 : System.Windows.Forms.Form
    {
      private System.Windows.Forms.RichTextBox rtfSql;
      private System.Windows.Forms.MainMenu mainMenu1;
      private System.Windows.Forms.MenuItem menuItem1;
      private System.Windows.Forms.MenuItem menuItemFormat;
      private System.Windows.Forms.MenuItem menuItem4;
      private System.Windows.Forms.MenuItem menuItemExit;
      private string[] mSqlKeyWords = new string[] {"select","from","where","in","between",
              "is","null","not","order by","asc","desc","insert","into","values","update", 
              "set","delete","truncate","table","join","on","create","drop"};
      public Form1() {
         InitializeComponent();
      }
      private void InitializeComponent() {
         this.rtfSql = new System.Windows.Forms.RichTextBox();
         this.mainMenu1 = new System.Windows.Forms.MainMenu();
         this.menuItem1 = new System.Windows.Forms.MenuItem();
         this.menuItemFormat = new System.Windows.Forms.MenuItem();
         this.menuItem4 = new System.Windows.Forms.MenuItem();
         this.menuItemExit = new System.Windows.Forms.MenuItem();
         this.SuspendLayout();
         // 
         // rtfSql
         // 
         this.rtfSql.Dock = System.Windows.Forms.DockStyle.Top;
         this.rtfSql.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
         this.rtfSql.Location = new System.Drawing.Point(0, 0);
         this.rtfSql.Name = "rtfSql";
         this.rtfSql.Size = new System.Drawing.Size(290, 290);
         this.rtfSql.TabIndex = 0;
         this.rtfSql.Text = "";
         // 
         // mainMenu1
         // 
         this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                  this.menuItem1});
         // 
         // menuItem1
         // 
         this.menuItem1.Index = 0;
         this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                  this.menuItemFormat,
                                                                                  this.menuItem4,
                                                                                  this.menuItemExit});
         this.menuItem1.Text = "&Actions";
         // 
         // menuItemFormat
         // 
         this.menuItemFormat.Index = 0;
         this.menuItemFormat.Shortcut = System.Windows.Forms.Shortcut.F12;
         this.menuItemFormat.Text = "&Format statements";
         this.menuItemFormat.Click += new System.EventHandler(this.menuItemFormat_Click);
         // 
         // menuItem4
         // 
         this.menuItem4.Index = 1;
         this.menuItem4.Text = "-";
         // 
         // menuItemExit
         // 
         this.menuItemExit.Index = 2;
         this.menuItemExit.Text = "E&xit";
         this.menuItemExit.Click += new System.EventHandler(this.menuItemExit_Click);
         // 
         // frmSql
         // 
         this.AutoScaleBaseSize = new System.Drawing.Size(8, 15);
         this.ClientSize = new System.Drawing.Size(300, 300);
         this.Controls.Add(this.rtfSql);
         this.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
         this.Menu = this.mainMenu1;
         this.Name = "frmSql";
         this.Text = "SQL Tool";
         this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
         this.ResumeLayout(false);
      }
      static void Main() {
            Application.Run(new Form1());
      }
      private void menuItemFormat_Click(object sender, System.EventArgs e)
      {
         for (int i = 0; i < 23; i++) 
         {
            int index = 0;
            while ( (index = rtfSql.Find(mSqlKeyWords[i],index,RichTextBoxFinds.WholeWord)) >= 0) 
            {
               index++;
               rtfSql.SelectionColor = Color.Blue;
               rtfSql.SelectedText = mSqlKeyWords[i].ToUpper();
            }
         }
      }
      private void menuItemExit_Click(object sender, System.EventArgs e)
      {
         Application.Exit(); 
      }
    }