delete label quantity

Question

I'm develop a system for count in C#. I have a button the count for clic.

I want that to arriving the number of my SNP, the messenger appears. but now I can. the number begins in the consecutive,I stayed when sending the message and does not start at zero

my code is the next.

 

decimal SSNP1 = 0;
            decimal.TryParse(SNP1.Text, out SSNP1);
            decimal SOK1 = 0;
            decimal.TryParse(OK1.Text, out SOK1);

           if (SSNP1 == SOK1)
             {
                    MessageBox.Show("imprime etiquetas");
                    SOK1 = 0;
                    OK1.Text = "";
            }
             else
               {
                A++;
                OK1.Text = Convert.ToString(A);
               }
          }