vb.net chart control point onclick event - vb.net

Question

Hello i am trying to add a click event to chart points but i am getting the following Error when i click the chart "Object reference not set to an instance of an object"
here is my code
Private Sub Chart1_Click(sender As Object, e As System.EventArgs) Handles Chart1.Click
Try
Dim pointindex As Integer
If result.ChartElementType = ChartElementType.DataPoint Then
pointindex = result.PointIndex
End If
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Private Sub Form1_MouseDown(sender As Object, e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
result = Chart1.HitTest(e.X, e.Y)
End Sub

Answer 1

If the mouse cursor is above a control only the control will receive events but not the form (for workarounds see e.g. this question: Winforms : Intercepting Mouse Event on Main Form first, not on Controls).
So Form1_MouseDown will not fire and result will still be Nothing in Chart1_Click.
A workaround could look like this:
Private Sub Chart1_Click(sender As Object, e As System.EventArgs) Handles Chart1.Click
Try
Dim pointindex As Integer
Dim result As HitTestResult
result = Chart1.HitTest(Cursor.Position.X, Cursor.Position.Y)
If result.ChartElementType = ChartElementType.DataPoint Then
pointindex = result.PointIndex
End If
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub