private void purchaseButton_Click(object sender, EventArgs e) { PurchaseInvoice pi = new PurchaseInvoice(); MainClass.showWindow(pi, this, MDI.ActiveForm);; }
public override void backButton_Click(object sender, EventArgs e) { PurchaseInvoice obj = new PurchaseInvoice(); MainClass.showWindow(obj, this, MDI.ActiveForm); }