If e.KeyCode = Keys.Enter And cbmPassportCountry.Text.Trim() <> "" Then
   SendKeys.Send("{tab}")
Else
   If btnSave.Enabled = True Then
      btnSave.Focus()
   End If
End If

Private Sub cbmPassportCountry_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles cbmPassportCountry.KeyDown
    'If e.KeyCode = Keys.Enter And cbmPassportCountry.Text.Trim() <> "" Then
    If e.KeyCode = Keys.Enter Then
        If btnSave.Enabled = True Then
            btnSave.Focus()
        Else
            SendKeys.Send("{tab}")
        End If
    End If

End Sub