} // end Validate Product data //Create Buttons on Form Begin private void btnCreateBook_Click(object sender, EventArgs e) { txtBookISBNLeft.ReadOnly = false; txtBookISBNRight.ReadOnly = false; txtBookAuthor.ReadOnly = false; txtBookPages.ReadOnly = false; FormController.activateBook(this); FormController.activateProduct(this); btnCreateBookCIS.Enabled = true; btnCreateCDChamber.Enabled = false; btnCreateCDOrchestra.Enabled = false; btnCreateDVD.Enabled = false; btnSave.Enabled = true; clickedBtn = "create_book"; }