Create a Sketch Point Example (C#)

//---------------------------------------------------------------------------
// Preconditions: Verify that the specified part template exists.
//
// Postconditions:
// 1. Opens a new part document and creates a sketch.
// 2. Creates a sketch point in the sketch.
// 3. Examine the graphics area.
//---------------------------------------------------------------------------
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
namespace CreateSketchPoint_CSharp.csproj
{
    partial class SolidWorksMacro
    {

        public void Main()
        {
            ModelDoc2 swModel = default(ModelDoc2);
            SketchManager swSkMgr = default(SketchManager);
            int longstatus = 0;
            bool boolstatus = false;

            swApp.ResetUntitledCount(0, 0, 0);
            swModel = (ModelDoc2)swApp.NewDocument("C:\\ProgramData\\SOLIDWORKS\\SOLIDWORKS 2012\\templates\\Part.prtdot", 0, 0, 0);
            swApp.ActivateDoc2("Part1", false, ref longstatus);
            swModel = (ModelDoc2)swApp.ActiveDoc;

            swSkMgr = swModel.SketchManager;
            swSkMgr.InsertSketch(true);
            boolstatus = swModel.Extension.SelectByID2("Top Plane", "PLANE", -0.0553489443349025, 0.00330468607538553, 0.0269617286188933, false, 0, null, 0);
            swModel.ClearSelection2(true);

            // Check whether document is active
            if (swModel == null)
            {
                swApp.SendMsgToUser2("A part document must be active.", (int) swMessageBoxIcon_e.swMbWarning, (int) swMessageBoxBtn_e.swMbOk);
                return;
            }

            // Check whether document is a part
            int modelType = 0;
            modelType = swModel.GetType();

            if (modelType != (int)swDocumentTypes_e.swDocPART)
            {
                swApp.SendMsgToUser2("A part document must be active.", (int)swMessageBoxIcon_e.swMbWarning, (int)swMessageBoxBtn_e.swMbOk);
                return;
            }

            SketchPoint skPoint = default(SketchPoint);
            skPoint = swSkMgr.CreatePoint(-0.127443, 0.042892, 0.0);
            swSkMgr.InsertSketch(true);

        }

        public SldWorks swApp;

    }
}