// Create a ChartControl instance.
ChartControl chart = new ChartControl();

// Create a series of a compatible view type, 
// and add it to the chart's collection,
// so the diagram object shall not to be equal to null.
Series series1 = new Series("Funnel 3D Series 1", ViewType.Funnel3D);
chart.Series.Add(series1);

// Create a diagram, and cast it to the FunnelDiagram3D type.
FunnelDiagram3D diagram = (FunnelDiagram3D)chart.Diagram;

// Access the diagram's options.
diagram.RuntimeScrolling = true;
diagram.RuntimeZooming = true;

' Create a ChartControl instance.
Dim chart As New ChartControl()

' Create a series of a compatible view type, 
' and add it to the chart's collection,
' so the diagram object shall not to be equal to Nothing.
Dim series1 As New Series("Funnel 3D Series 1", ViewType.Funnel3D)
chart.Series.Add(series1)

' Create a diagram, and cast it to the FunnelDiagram3D type.
Dim diagram As FunnelDiagram3D = CType(chart.Diagram, FunnelDiagram3D)

' Access the diagram's options.
diagram.RuntimeScrolling = True
diagram.RuntimeZooming = True