//modify button pressed in package tab
        private void btnModifyPackage_Click(object sender, EventArgs e)
        {
            SelectedRowPackage();
            AddModifyPackages modifyPackages = new AddModifyPackages();

            modifyPackages.addPackage = false;
            modifyPackages.package    = package;
            DialogResult result = modifyPackages.ShowDialog(); //shows add modify package form

            this.DisplayPackages();
            this.DisplayPackageProdSup();
        }
        //add button pressed in package tab
        private void btnAddPackage_Click(object sender, EventArgs e)
        {
            AddModifyPackages addModifyPackage = new AddModifyPackages();

            addModifyPackage.addPackage = true;
            DialogResult result = addModifyPackage.ShowDialog(); //showing the add modify package form

            if (result == DialogResult.OK)                       //if user clicks accept in other form
            {
                package = addModifyPackage.package;
                this.DisplayPackages();
                this.DisplayPackageProdSup();
            }
        }