Hide or Show First Column in Hole Table Example (C#)

This example shows how to hide the first column in a hole table.

//-------------------------------------------------------------------
// Preconditions:
// 1. Open public_documents\tutorial\api\simplehole.slddrw.
// 2. Select the hole table feature in the FeatureManager
//    design tree.
// 3. Open the Immediate window.
//
// Postconditions:
// 1. Hides the first column.
// 2. Examine the hole table and Immediate window.
//
// NOTE: Because the drawing is used elsewhere, do not save changes.
//------------------------------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
using System.Diagnostics;
namespace ColumnHiddenTableAnnotation_CSharp.csproj
{
    partial class SolidWorksMacro
    {
        public void Main()
        {

            ModelDoc2 swModel = default(ModelDoc2);
            SelectionMgr swSelMgr = default(SelectionMgr);
            object[] swHoleTableAnnotation = new object[1];
            TableAnnotation swTableAnnotation = default(TableAnnotation);
            Annotation swAnnotation = default(Annotation);
            HoleTable swHoleTable = default(HoleTable);

            swModel = (ModelDoc2)swApp.ActiveDoc;
            swSelMgr = (SelectionMgr)swModel.SelectionManager;
            if ((swSelMgr.GetSelectedObjectCount() == 0 | !(swSelMgr.GetSelectedObjectType(1) == (int)swSelectType_e.swSelHOLETABLEFEATS)))
            {
                System.Windows.Forms.MessageBox.Show("Please select a hole table feature in the FeatureManager design tree.");
                return;
            }
            swHoleTable = (HoleTable)swSelMgr.GetSelectedObject6(1, -1);
            swHoleTableAnnotation = (object[])swHoleTable.GetTableAnnotations();
            swTableAnnotation = (TableAnnotation)swHoleTableAnnotation[0];
            swAnnotation = (Annotation)swTableAnnotation.GetAnnotation();
            // If column hidden, then show it
            if ((swTableAnnotation.get_ColumnHidden(0)))
            {

                Debug.Print(" First column hidden before API call: " + swTableAnnotation.get_ColumnHidden(0));
                swTableAnnotation.set_ColumnHidden(0, false);
                Debug.Print(" First column hidden after API call: " + swTableAnnotation.get_ColumnHidden(0));
            }
            else
            {
                // If column shown, then hide it
                Debug.Print(" First column hidden before API call: " + swTableAnnotation.get_ColumnHidden(0));
                swTableAnnotation.set_ColumnHidden(0, true);
                Debug.Print(" First column hidden after API call: " + swTableAnnotation.get_ColumnHidden(0));
            }
        }
        public SldWorks swApp;
    }
}