mapControl.MapEditor.ShowEditorPanel = true;

mapControl.MapEditor.ShowEditorPanel = true

private void OnTransformModeItemClick(object sender, ItemClickEventArgs e) {
    mapControl.MapEditor.SetTransformMode(MapItemTransform.All);
}
private void OnEditModeItemClick(object sender, ItemClickEventArgs e) {
    mapControl.MapEditor.SetEditMode();
}
private void OnCreatePolygonItemClick(object sender, ItemClickEventArgs e) {
    mapControl.MapEditor.SetCreateMode(CreatableMapItemKind.Polygon);
}
private void OnDefaultModeItemClick(object sender, ItemClickEventArgs e) {
    mapControl.MapEditor.ResetEditMode();
}

Private Sub OnTransformModeItemClick(ByVal sender As Object, ByVal e As ItemClickEventArgs)
    mapControl.MapEditor.SetTransformMode(MapItemTransform.All)
End Sub
Private Sub OnEditModeItemClick(ByVal sender As Object, ByVal e As ItemClickEventArgs)
    mapControl.MapEditor.SetEditMode()
End Sub
Private Sub OnCreatePolygonItemClick(ByVal sender As Object, ByVal e As ItemClickEventArgs)
    mapControl.MapEditor.SetCreateMode(CreatableMapItemKind.Polygon)
End Sub
Private Sub OnDefaultModeItemClick(ByVal sender As Object, ByVal e As ItemClickEventArgs)
    mapControl.MapEditor.ResetEditMode()
End Sub

mapControl.MapEditor.MapItemCreating += OnMapItemCreating;
//...
private void OnMapItemCreating(object sender, MapItemCreatingEventArgs e) {
    MapShape shape = e.Item as MapShape;
    if(shape != null) {
        shape.Fill = Color.Orange;
    }
}

AddHandler mapControl.MapEditor.MapItemCreating, AddressOf OnMapItemCreating
'...
Private Sub OnMapItemCreating(ByVal sender As Object, ByVal e As MapItemCreatingEventArgs)
    Dim shape As MapShape = TryCast(e.Item, MapShape)
    If shape IsNot Nothing Then
        shape.Fill = Color.Orange
    End If
End Sub

mapControl.MapEditor.MapItemEditing += OnMapItemEditing;
mapControl.MapEditor.MapItemEdited += OnMapItemEdited;
// ...
private void OnMapItemEditing(object sender, MapItemEditingEventArgs e) {
    if(e.Action == MapEditorAction.PointUpdate) {
        Cursor.Current = Cursors.Hand;
    }
}
private void OnMapItemEdited(object sender, MapItemEditedEventArgs e) {
        MessageBox.Show("Action: " + e.Action);
}

AddHandler mapControl.MapEditor.MapItemEditing, AddressOf OnMapItemEditing
AddHandler mapControl.MapEditor.MapItemEdited, AddressOf OnMapItemEdited  
' ...    
Private Sub OnMapItemEditing(ByVal sender As Object, ByVal e As MapItemEditingEventArgs)
    If (e.Action = MapEditorAction.PointUpdate) Then
        Cursor.Current = Cursors.Hand
    End If    
End Sub
Private Sub OnMapItemEdited(ByVal sender As Object, ByVal e As MapItemEditedEventArgs)
    MessageBox.Show(("Action: " + e.Action))
End Sub

mapControl.MapEditor.ActiveLayer.ExportToKml(filePath);

mapControl.MapEditor.ActiveLayer.ExportToKml(filePath)

private void simpleButton1_Click(object sender, EventArgs e) {
    VectorItemsLayer activeLayer = mapControl1.MapEditor.ActiveLayer as VectorItemsLayer;
    if (activeLayer != null) {
        MapItemStorage activeLayerData = activeLayer.Data as MapItemStorage;
        if (activeLayerData != null) {
            // Create a new layer for dots:
            VectorItemsLayer dotLayer = new VectorItemsLayer();
            MapItemStorage storage = new MapItemStorage();
            dotLayer.Data = storage;
            mapControl1.Layers.Add(dotLayer);
            // Access active layer items:
            foreach (MapPath item in activeLayerData.Items) {
                item.Fill = Color.Coral;
                foreach (MapPathSegment segment in item.Segments) {
                    foreach (GeoPoint point in segment.Points) {                            
                            storage.Items.Add(new MapDot() { Location = point, Size = 18, Stroke = Color.Blue });
                    }
                }

            }
        }
    }
}

Private Sub simpleButton1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim activeLayer As VectorItemsLayer = TryCast(mapControl1.MapEditor.ActiveLayer, VectorItemsLayer)

    If activeLayer IsNot Nothing Then
        Dim activeLayerData As MapItemStorage = TryCast(activeLayer.Data, MapItemStorage)

        If activeLayerData IsNot Nothing Then
            ' Create a new layer for dots:
            Dim dotLayer As VectorItemsLayer = New VectorItemsLayer()
            Dim storage As MapItemStorage = New MapItemStorage()
            dotLayer.Data = storage
            mapControl1.Layers.Add(dotLayer)
            ' Access active layer items:
            For Each item As MapPath In activeLayerData.Items
                item.Fill = Color.Coral

                For Each segment As MapPathSegment In item.Segments

                    For Each point As GeoPoint In segment.Points
                        storage.Items.Add(New MapDot() With {
                            .Location = point,
                            .Size = 18,
                            .Stroke = Color.Blue
                        })
                    Next
                Next
            Next
        End If
    End If
End Sub

mapControl.MapEditor.UpdateItemPoint(mapPolygon, new GeoPoint(57.1, 16.5), 0, 0);

mapControl.MapEditor.UpdateItemPoint(mapPolygon, New GeoPoint(57.1, 16.5), 0, 0)

mapControl.MapEditor.TranslateItems(items, 20, 0);

mapControl.MapEditor.TranslateItems(items, 20, 0)

private void Form_Load(object sender, EventArgs e) {
    trackBarControl.Properties.Maximum = 100;
    trackBarControl.Properties.Minimum = 0;
    trackBarControl.Value = 100;
    trackBarControl.EditValueChanged += trackBarControl_EditValueChanged;
}
private void trackBarControl_EditValueChanged(object sender, EventArgs e) {
    double tolerance = Convert.ToDouble(trackBarControl.EditValue);
    mapControl.MapEditor.SimplifyItems(mapControl.MapEditor.ActiveLayer.Data.Items, tolerance);
}

Private Sub Form_Load(ByVal sender As Object, ByVal e As EventArgs)
    trackBarControl.Properties.Maximum = 100
    trackBarControl.Properties.Minimum = 0
    trackBarControl.Value = 100
    trackBarControl.EditValueChanged += AddressOf trackBarControl_EditValueChanged
End Sub

Private Sub trackBarControl_EditValueChanged(ByVal sender As Object, ByVal e As EventArgs)
    Dim tolerance As Double = Convert.ToDouble(trackBarControl.EditValue)
    mapControl.MapEditor.SimplifyItems(mapControl.MapEditor.ActiveLayer.Data.Items, tolerance)
End Sub