help with dynamic checkboxes

Question

hi....

 

i have written following code which displays dynamic check boxes for X and Y co-ordinates...

now, i need help in adding some logic and functionality in them...

i want that the user can check only 1 check box for each co-ordinate i.e 1 for X axis and 1 for Y axis...

also if user select same check boxes for both co-ordinates i.e checkbox 2 for X and also check box 2 for Y error message should be displayed...

i also want to get the index number of checked box as an integer...

as i am new to the language em not getting these things rite...

help is required...

thankyou in advance...

 my code is....

------------------------------------------------------------------------------------------------------------------------------------------------------------------

  public partial class Form1 : Form
    {
        CheckBox[] CB2;
           CheckBox[] CB;
           string[] names = new string[] { "sepal length", "sepal width", "petal length", "petal width" };
           int No_Columns;
           public Form1()
           {
               InitializeComponent();
            
               No_Columns=4;
              
           CB=new CheckBox[No_Columns];
               for (int i = 0; i < No_Columns; i++)
               {
                   CB[i] = new CheckBox();
                   CB[i].Left = 20;
                   CB[i].Top = (i + 1) * 30;
                   CB[i].Name = "CB" + i.ToString();
                   CB[i].Text = names[i];//"CB" + i.ToString();
                   CB[i].CheckedChanged += new EventHandler(CheckedChanged);
                  // this.Controls.Add(CB[i]);
                
               }
           

              CB2=new CheckBox[No_Columns];
               for (int i = 0; i < No_Columns; i++)
               {
                   CB2[i]= new CheckBox();
                   CB2[i].Left = 190;
                   CB2[i].Top = (i + 1) * 30;
                   CB2[i].Name = "CB2" + i.ToString();
                   CB2[i].Text = names[i];//"CB2" + i.ToString();
                   CB2[i].CheckedChanged += new EventHandler(CheckedChanged2);
                   //this.Controls.Add(CB2[i]);
               }
               for (int i = 0; i < No_Columns; i++) {
                   this.Controls.Add(CB[i]);
                   this.Controls.Add(CB2[i]);

               }
              
           }
-------------------------- Event HAndlers-------------------------------
 

 private void CheckedChanged(object sender, EventArgs e)
           {
               CheckBox button = (CheckBox)sender;
               //System.Windows.Forms.MessageBox.Show(button.Text.ToString());
               for (int i = 0; i < No_Columns; i++)
               {
                   if ("CB" + i.ToString() == button.Text.ToString())
                   {


                   }
                   else
                   {
                       CB[i].Checked = false;
                   }
               }
           }
               private void CheckedChanged2(object sender, EventArgs e)
           {
               CheckBox button = (CheckBox)sender;
               //System.Windows.Forms.MessageBox.Show(button.Text.ToString());
               for (int i = 0; i < No_Columns; i++)
               {
                   if ("CB2" + i.ToString() == button.Text.ToString())
                   {
                    
 
                   }
                   else
                   {
                       CB2[i].Checked = false;
                   }
               }
               //CheckBox button = (CheckBox)sender;
               //button.Checked = true;
           }