Hide the FeatureManager Design Tree Example (C#)

//----------------------------------------------------------------------------
// Preconditions:
// 1. Model document is open.
// 2. Rename the namespace of this macro to match the name of your C# project.
//
// Postconditions: FeatureManager design tree is hidden.
//--------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
namespace HideFeatureManager_CSharp.csproj
{
    partial class SolidWorksMacro
    {

        void Main()
        {

            ModelDoc2 swModel;
            ModelDocExtension swModDocExt;
            bool bRet;

            swModel = (ModelDoc2)swApp.ActiveDoc;
            swModDocExt = swModel.Extension;
            bRet = swModDocExt.HideFeatureManager(true);
        }


        public SldWorks swApp;


    }
}