# InMemoryMarkerOverlay blocking mouse clicks

**URL:** <https://community.thinkgeo.com/t/inmemorymarkeroverlay-blocking-mouse-clicks/8162>\
**Category:** WinForms\
**Created:** [August 18, 2016, 3:44pm UTC](https://community.thinkgeo.com/t/inmemorymarkeroverlay-blocking-mouse-clicks/8162 "2016-08-18T15:44:38Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![Ethan](https://community.thinkgeo.com/user_avatar/community.thinkgeo.com/ethan/32/19964_2.png) [@Ethan](https://community.thinkgeo.com/u/Ethan)\
**Post date:** [August 19, 2016, 8:54am UTC](https://community.thinkgeo.com/t/inmemorymarkeroverlay-blocking-mouse-clicks/8162/2 "2016-08-19T08:54:10Z")

</div>

Hi David,

That’s because the marker had accept the event and blocked it into map.

Please see this topic which should be helpful: [PointMarkerStyle blocks MapClick event?](https://community.thinkgeo.com/t/pointmarkerstyle-blocks-mapclick-event/7937)

And as below is my test code:

```
 public class ClickableMarkerOverlay : InMemoryMarkerOverlay
{
    public event EventHandler Click;

    protected override GeoCollection<Marker> GetMarkersForDrawingCore(RectangleShape boundingBox)
    {
        var markers = base.GetMarkersForDrawingCore(boundingBox);
        foreach (var marker in markers)
        {
            marker.Click -= Click;
            marker.Click += Click;                
        }

        return markers;
    }

}

public class DisplayShapeMap : UserControl
{
    public DisplayShapeMap()
    {
        InitializeComponent();
    }

    private void DisplayMap_Load(object sender, EventArgs e)
    {
        winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
        winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);
        winformsMap1.CurrentExtent = new RectangleShape(-139.2, 92.4, 120.9, -93.2);

        ClickableMarkerOverlay viewLinkMarkerOverlay = new ClickableMarkerOverlay() { Name = "test", MapControl = winformsMap1 };            
        viewLinkMarkerOverlay.ZoomLevelSet.ZoomLevel01.DefaultPointMarkerStyle.Image = Properties.Resources.ThinkGeoLogo;
        viewLinkMarkerOverlay.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
        winformsMap1.Overlays.Add(viewLinkMarkerOverlay.Name, viewLinkMarkerOverlay);

        Feature vlFeature = new Feature(new PointShape(10, 10));
        viewLinkMarkerOverlay.FeatureSource.BeginTransaction();
        viewLinkMarkerOverlay.FeatureSource.AddFeature(vlFeature);
        viewLinkMarkerOverlay.FeatureSource.CommitTransaction();
        winformsMap1.Overlays.MoveToTop(viewLinkMarkerOverlay.Name);
        

        winformsMap1.MapClick += WinformsMap1_MapClick;
        winformsMap1.MouseClick += WinformsMap1_MouseClick;
        winformsMap1.MouseDown += WinformsMap1_MouseDown;
        winformsMap1.MouseUp += WinformsMap1_MouseUp;
        winformsMap1.MouseMove += WinformsMap1_MouseMove;

        viewLinkMarkerOverlay.Click += ViewLinkMarkerOverlay_Click;

        winformsMap1.Refresh();
    }

    private void ViewLinkMarkerOverlay_Click(object sender, EventArgs e)
    {
        Debug.WriteLine("Marker clicked!!!!");
    }

    private void WinformsMap1_MouseMove(object sender, MouseEventArgs e)
    {
        Debug.WriteLine("MouseMove");
    }

    private void WinformsMap1_MouseUp(object sender, MouseEventArgs e)
    {
        Debug.WriteLine("MouseUp");
    }

    private void WinformsMap1_MouseDown(object sender, MouseEventArgs e)
    {
        Debug.WriteLine("MouseDown");
    }

    private void WinformsMap1_MouseClick(object sender, MouseEventArgs e)
    {
        Debug.WriteLine("MouseClick");
    }

    private void WinformsMap1_MapClick(object sender, MapClickWinformsMapEventArgs e)
    {
        Debug.WriteLine("MapClick");            
    }
}

```

This only implement click event, you should want to implement all other event which you need in the ClickableMarkerOverlay class.

Regards,

Don

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_[View the full topic](https://community.thinkgeo.com/t/inmemorymarkeroverlay-blocking-mouse-clicks/8162)._