[RESOLVED] Which Exception to Use?

[computerman]

I understand the error message, but I am not sure which exception to use as I want to generate my own error message.

Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        
        Try
            Me.Validate()

            If RoomSetup.Focus Then
                Me.RoomCodesBindingSource.EndEdit()
                Me.RoomCodesTableAdapter.Update(Me.RestelDataSet.RoomCodes)
            End If

            If Accounts.Focus Then
                Me.BudgetTypesBindingSource.EndEdit()
                Me.BudgetTypesTableAdapter.Update(Me.RestelDataSet.BudgetTypes)
             End If

        Catch ex As System.Data.ConstraintException
            MsgBox("My Own Message of some sort")

        End Try
    End Sub

As you can see I am using an exception but it seems not to be the correct one as I get the message attached not the one I want.

Any help would be appreciated.

Computerman