Membuat chart ( grapic) di vb.net part3

Coding untuk pertama kali form diload :

Form load

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try
cbchart.SelectedIndex = 0
Catch ex As Exception
MsgBox(ex.Message)
Finally
MyConnection.close()
End Try

End Sub

Combobox

Private Sub cbchart_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cbchart.SelectedIndexChanged
Try
RefreshChart()
Catch ex As Exception
MsgBox(ex.Message)
Finally
MyConnection.close()
End Try
End Sub

source : http://ilmukomputer.org