private void btnCopyD_Click(object sender, EventArgs e)
        {
            Decrypt frm = new Decrypt();

            frm.Show();
            frm.txtP.Text = txtP.Text;
            frm.txtQ.Text = txtQ.Text;
        }
        private void btnCopyToDecrypt_Click(object sender, EventArgs e)
        {
            Decrypt decrypt = new Decrypt();

            decrypt.Show();

            decrypt.txtCipher.Text = txtCipher.Text;
            decrypt.txtC1.Text     = txtC1.Text;
            decrypt.txtC2.Text     = txtC2.Text;
        }
        private void btnDecrypt_Click(object sender, EventArgs e)
        {
            Decrypt frm = new Decrypt();

            frm.Show();
        }