I believe that you can, if you are using bound controls, use the CancelUpdate() method of the recordset object that you have bound to. You have to check the status of the recordset first. There may be other statuses that you need to check for but the following code should work.
If (rs.State And adRecModified) Or (rs.State And adRecNew) Then
rs.CancelUpdate
End If
hope that helps.
scott