public EditProductForm(Form1 form1)
        {
            InitializeComponent();

            this.form1 = form1;

            this.LayoutMdi(MdiLayout.TileVertical);
            itemForm = form1.item_form;

            txtBox_Group.Text          = form1.products[itemForm.Selected_Items].Group;
            txtBox_Name.Text           = form1.products[itemForm.Selected_Items].Name;
            txtBox_Manufacturer.Text   = form1.products[itemForm.Selected_Items].Manufecturer;
            txtBox_Date.Text           = form1.products[itemForm.Selected_Items].Date;
            txtBox_ExpirationDate.Text = form1.products[itemForm.Selected_Items].Expiration;
        }