using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.DesktopEdition;
 
namespace MDIform
{
    public partial class childForm : Form
    {
        public childForm()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            WinformsMap winformsMap1 = (WinformsMap)this.Parent;
            LayerOverlay layerOverlay = (LayerOverlay)winformsMap1.Overlays["PointOverlay"];
            InMemoryFeatureLayer inMemoryFeatureLayer = (InMemoryFeatureLayer)layerOverlay.Layers[0];
            inMemoryFeatureLayer.Open();
            inMemoryFeatureLayer.EditTools.BeginTransaction();
            PointShape pointShape = new PointShape(Convert.ToDouble(txtX.Text),Convert.ToDouble(txtY.Text));
            inMemoryFeatureLayer.EditTools.Add(new Feature(pointShape));
            inMemoryFeatureLayer.EditTools.CommitTransaction();
            inMemoryFeatureLayer.Close();
 
            winformsMap1.Refresh(layerOverlay);
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ThinkGeo.MapSuite.Core;
using ThinkGeo.MapSuite.DesktopEdition;
namespace MDIform
{
    public partial class MDIParent1 : Form
    {
       public MDIParent1()
        {
            InitializeComponent();
            Form childForm1 = new childForm();
            childForm1.MdiParent = this;
            childForm1.Parent = winformsMap1;
            childForm1.Show();
        }
        private void MDIParent1_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.CurrentExtent = new RectangleShape(-125, 47, -67, 25);
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.FromArgb(255, 198, 255, 255));
            //Displays the World Map Kit as a background.
            ThinkGeo.MapSuite.DesktopEdition.WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new ThinkGeo.MapSuite.DesktopEdition.WorldMapKitWmsDesktopOverlay();
            winformsMap1.Overlays.Add(worldMapKitDesktopOverlay);
            InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();
            inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.StandardColors.Red, 12, GeoColor.StandardColors.Black, 2);
            inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            LayerOverlay layerOverlay = new LayerOverlay();
            layerOverlay.Layers.Add("Point",inMemoryFeatureLayer);
            winformsMap1.Overlays.Add("PointOverlay",layerOverlay);
            winformsMap1.Refresh();
        }
        private void winformsMap1_MouseMove(object sender, MouseEventArgs e)
        {
            //Displays the X and Y in screen coordinates.
            statusStrip1.Items["toolStripStatusLabelScreen"].Text = "X:" + e.X + " Y:" + e.Y;
            //Gets the PointShape in world coordinates from screen coordinates.
            PointShape pointShape = ExtentHelper.ToWorldCoordinate(winformsMap1.CurrentExtent, new ScreenPointF(e.X, e.Y), winformsMap1.Width, winformsMap1.Height);
            //Displays world coordinates.
            statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4);
        }
     }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace MDIform
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MDIParent1());
        }
    }
}