Public Sub GetChartElement ( _
    x As Integer, _
    y As Integer, _
    ByRef ElementID As Integer, _
    ByRef Arg1 As Integer, _
    ByRef Arg2 As Integer _
)

Dim instance As Chart
Dim x As Integer
Dim y As Integer
Dim ElementID As Integer
Dim Arg1 As Integer
Dim Arg2 As Integer

instance.GetChartElement(x, y, ElementID, Arg1, Arg2)

public void GetChartElement (
    int x,
    int y,
    ref int ElementID,
    ref int Arg1,
    ref int Arg2
)

WithEvents elementChart As Microsoft.Office.Tools.Excel.Chart

Private Sub DisplayChartElement()
    Globals.Sheet1.Range("A1", "A5").Value2 = 22
    Globals.Sheet1.Range("B1", "B5").Value2 = 55

    elementChart = Me.Controls.AddChart(Me.Range("D2", "H12"), _
        "elementChart")
    elementChart.SetSourceData(Globals.Sheet1.Range("A1", "B5"), _
        Excel.XlRowCol.xlColumns)
    elementChart.ChartType = Excel.XlChartType.xl3DColumn
End Sub

Sub elementChart_MouseDownHandler(ByVal Button As Integer, ByVal Shift As Integer, _
    ByVal x As Integer, ByVal y As Integer) Handles elementChart.MouseDown

    Dim elementID As Integer = 0
    Dim arg1 As Integer = 0
    Dim arg2 As Integer = 0

    Dim innerChart As Excel.Chart = CType( _
        Microsoft.Office.Tools.Excel.ExcelLocale1033Proxy.Unwrap( _
        elementChart.InnerObject), Excel.Chart)

    innerChart.GetChartElement(x, y, elementID, arg1, arg2)

    MsgBox("Chart element is: " & CType(elementID, Excel.XlChartItem).ToString() _
            & Constants.vbNewLine & "arg1 is: " & arg1.ToString() _
            & Constants.vbNewLine & "arg2 is: " & arg2.ToString())
End Sub

private Microsoft.Office.Tools.Excel.Chart elementChart;

private void DisplayChartElement()
{
    this.Range["A1", "A5"].Value2 = 22;
    this.Range["B1", "B5"].Value2 = 55;

    elementChart = this.Controls.AddChart(this.Range["D2", "H12"],
        "elementChart");

    elementChart.SetSourceData(this.Range["A1", "B5"],
        Excel.XlRowCol.xlColumns);
    elementChart.ChartType = Excel.XlChartType.xl3DColumn;
    elementChart.MouseDown +=
        new Excel.ChartEvents_MouseDownEventHandler(elementChart_MouseDown);
}

void elementChart_MouseDown(int Button, int Shift, int x, int y)
{
    Int32 elementID = 0;
    Int32 arg1 = 0;
    Int32 arg2 = 0;

    Excel.Chart innerChart = (Excel.Chart)Microsoft.Office.Tools.
        Excel.ExcelLocale1033Proxy.Unwrap(elementChart.InnerObject);

    innerChart.GetChartElement(x, y, ref elementID, ref arg1, ref arg2);

    MessageBox.Show("Chart element is: " + ((Excel.XlChartItem)elementID).ToString()
        + "\n arg1 is: " + arg1.ToString() + "\n arg2 is: " + arg2.ToString());
}