C# Menu Strip Yardımı ?

using System; 
  using System.Collections.Generic; 
  using System.ComponentModel; 
  using System.Data; 
  using System.Drawing; 
  using System.Linq; 
  using System.Text; 
  using System.Threading.Tasks; 
  using System.Windows.Forms; 
   
  namespace WindowsFormsApplication3 
  { 
      public partial class Form1 : Form 
      { 
          Point nokta; 
          public Form1() 
          { 
              InitializeComponent(); 
          } 
   
          private void Form1_Load(object sender, EventArgs e) 
          { 
   
          } 
   
          private void button1_Click(object sender, EventArgs e) 
          { 
              Application.Exit(); 
          } 
   
          private void windows7ToolStripMenuItem_Click(object sender, EventArgs e) 
          { 
              label1.Text = "Microsoft Windows 7 Professional"; 
              label2.Text = "74T2M-DKDBC-788W3-H689G-6P6GT\nYKHFT-KW986-GK4PY-FDWYH-7TP9F"; 
              label3.Text = "Microsoft Windows 7 Home Premium"; 
              label4.Text = "6GF36-P4HWR-BFF84-6GFC2-BWX77\nBHDWW-V8D3T-39X3C-K7PRG-3XFYB\n6GF36-P4HWR-BFF84-6GFC2-BWX77"; 
              label5.Text = "Microsoft Windows 7 Ultimate"; 
              label6.Text = "FJGCP-4DFJD-GJY49-VJBQ7-HYRR2\n2Y4WT-DHTBF-Q6MMK-KYK6X-VKM6G\n342DG-6YJR8-X92GV-V7DCV-P4K27"; 
              label7.Text = "Microsoft Windows 7 Starter"; 
              label8.Text = "RH98C-M9PW4-6DHR7-X99PJ-3FGDB"; 
              label9.Text = "Microsoft Windows 7 Enterprise"; 
              label10.Text = "33PXH-7Y6KF-2VJC9-XBBR8-HVTHH"; 
          } 
   
          private void windows8ToolStripMenuItem_Click(object sender, EventArgs e) 
          { 
              label1.Text = "TK8TP-9JN6P-7X7WW-RFFTV-B7QPF"; 
              label2.Text = "RGQ3V-MCMTC-6HP8R-98CDK-VP3FM"; 
              label3.Text = "KBHBX-GP9P3-KH4H4-HKJP4-9VYKQ"; 
              label4.Text = "6JQ32-Y9CGY-3Y986-HDQKT-BPFPG"; 
              label5.Text = "BCGX7-P3XWP-PPPCV-Q2H7C-FCGFR"; 
              label6.Text = "MVBCQ-B3VPW-CT369-VM9TB-YFGBP"; 
              label7.Text = "6JQ32-Y9CGY-3Y986-HDQKT-BPFPG"; 
              label8.Text = "XKY4K-2NRWR-8F6P2-448RF-CRYQH"; 
              label9.Text = "NG4HW-VH26C-733KW-K6F98-J8CK4"; 
              label10.Text = "RR3BN-3YY9P-9D7FC-7J4YF-QGJXW"; 
          } 
   
          private void windowsXPToolStripMenuItem_Click(object sender, EventArgs e) 
          { 
              label1.Text = "FCKRW-RHQQ2-YXRKT-8TG6W-2B7Q8\nXXPBP-7WT34-TTJH8-KGDRD-DFJR7\nFCKGW-RHQQ2-YXRKT-8TG6W-2B7Q8\nVFWGM-3GRYG-QB43V-MVP84-XB3G9\nHHBCG-3V2QR-72KPV-YQCXW-KHGJ7\nVX4XG-8FFCQ-W6Q28-B3VDG-CTX9C\n47YK2-D8R6C-BPQBY-F4R3R-TVBTH\nTBHXM-H6W74-4D8GM-B6XX4-M29T8\n7XRRM-FQP8R-MW847-XMF6Q-XHYXK\nG4XWB-YQX7Y-WHPW6-4BBBQ-YBBMY"; 
              label2.Text = ""; 
              label3.Text = ""; 
              label4.Text = ""; 
              label5.Text = ""; 
              label6.Text = ""; 
              label7.Text = ""; 
              label8.Text = ""; 
              label9.Text = ""; 
              label10.Text = ""; 
          } 
   
          private void Form1_MouseDown(object sender, MouseEventArgs e) 
          { 
              nokta = new Point(e.X, e.Y); 
          } 
   
          private void Form1_MouseMove(object sender, MouseEventArgs e) 
          { 
              if (e.Button==MouseButtons.Left) 
              { 
                  Point koordinat; 
                  koordinat = Control.MousePosition; 
                  koordinat.Offset(-nokta.X, -nokta.Y); 
                  Location = koordinat; 
              } 
          } 
      } 
  }