private void purhcaseToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //set the value of the transaction type String
            transactionType = "Purchase";

            frmPurchaseSales purchase = new frmPurchaseSales();

            purchase.Show();
        }
        private void salesFormsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //set the value of the transaction type String
            transactionType = "Sales";

            frmPurchaseSales Sales = new frmPurchaseSales();

            Sales.Show();
        }