Access Reports a little vb help?

I have this little bit of VB in one of my reports, it works a treat although when you click on the close button, another message box appears with "The Open report Action Was Cancelled" how do i get rid of this?????
Private Sub Report_NoData(Cancel As Integer)
MsgBox "No Data Found for this Period"
Cancel = True

Any help would be greatly appriciated.
Steve