// Supplier's Modify Button
        private void btnModifySupplier_Click(object sender, EventArgs e)
        {
            SelectedRowSupplier(); // gets info for user selected row
            //creates new form object
            frmSupplierAddModify modifySupplierForm = new frmSupplierAddModify();

            modifySupplierForm.addSupplier = false;    //tells form the modift button was pressed
            modifySupplierForm.supplier    = supplier; //passes values over to the supplier object in the form
            DialogResult result = modifySupplierForm.ShowDialog();

            this.DisplaySupplier();
            this.DisplayPackages();
            this.DisplayPackageProdSup();
        }
        // Supplier's Add Button in supplier tab
        private void btnAddSupplier_Click(object sender, EventArgs e)
        {
            // call for new form
            frmSupplierAddModify addSupplierForm = new frmSupplierAddModify();

            addSupplierForm.addSupplier = true;                 //tells form the add button was pressed
            DialogResult result = addSupplierForm.ShowDialog(); // show form

            if (result == DialogResult.OK)                      //if user selects ok from add form
            {
                supplier = addSupplierForm.supplier;
                this.DisplaySupplier();
                this.DisplayPackages();
                this.DisplayPackageProdSup();
            }
        }