Geef standaard de naam van de derde partij weer in het eerste raster van de Ondervraging voor commerciële artikels

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using MercatorApi;
using MercatorExtensions;
using MercatorUi;
using System.Windows.Forms;
using System.Linq;

namespace SigStock
{
    public class Customizer : MercatorUi.ICustomizers.IFormLoadCustomizer, MercatorUi.ICustomizers.IFormClosedCustomizer
    {

        public void FormLoadCustomize(Form windowsForm)
        {
            MercatorUi.Forms.Sig.SigForm sigForm = (MercatorUi.Forms.Sig.SigForm)windowsForm;
            var stockInterro = sigForm.MovableControls.Values.OfType<MercatorUi.Forms.Sig.SigObjects.StockInterro>().FirstOrDefault();
            if (stockInterro != null)
                stockInterro.Grid1.StandardColumnsCreated += Grid1_StandardColumnsCreated;
        }

        public void FormClosedCustomize(Form windowsForm)
        {
            MercatorUi.Forms.Sig.SigForm sigForm = (MercatorUi.Forms.Sig.SigForm)windowsForm;
            var stockInterro = sigForm.MovableControls.Values.OfType<MercatorUi.Forms.Sig.SigObjects.StockInterro>().FirstOrDefault();
            if (stockInterro != null)
                stockInterro.Grid1.StandardColumnsCreated -= Grid1_StandardColumnsCreated;
        }

        private void Grid1_StandardColumnsCreated(object sender, EventArgs e)
        {
            var grid1 = (MercatorUi.GridPro.DataGridViewXPro)sender;
            string menuString = Api.Proper(_Divers.Iif_langue(Globals.Langue, "Show Thirdp. Name", "Derdepers. Naam Tonen", "Montrer Nom Tiers"));
            var mnuToggleName = grid1.ContextMenuStripGrid.Items.OfType<ToolStripMenuItem>().Where(p => p.Text == menuString).FirstOrDefault();
            if ((mnuToggleName != null) && !mnuToggleName.Checked)
                mnuToggleName.PerformClick();
        }
    }
}