Kevin,

Okay, that took care of that problem. Now I can't get the grid to load the invoice data. I am using mmDataGrid. The binding source is set to Invoice. There is only one invoice loaded right now. Could that cause a problem firing the code to load the dataset?

Here's the code for selecting an invoice:

        private void ddlInvoiceNo_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (this.ddlInvoiceNo.SelectedText != "")
                oInvoice.GetInvoiceByInvoiceNo(this.ddlInvoiceNo.SelectedText);
            this.grdInvoice.Refresh();
        }

Am I missing something?

Thanks.

Linda