Hi Digi, thatnks for the reply. The function is awesome. it works like charm ^^ BTW, i just find out another solution, to share with you guys here =D I used webclient class, there is a readopen() method to achieve this. here is a sample class which i get from msdn. Public Class Test Public Shared Sub Main(args() As String) If args Is Nothing OrElse args.Length = 0 Then Throw New ApplicationException("Specify the URI of the resource to retrieve.") End If Dim client As New WebClient() ' Add a user agent header in case the ' requested URI contains a query. client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)") Dim data As Stream = client.OpenRead(args(0)) Dim reader As New StreamReader(data) Dim s As String = reader.ReadToEnd() Console.WriteLine(s) data.Close() reader.Close() End Sub 'Main End Class 'Test :-D

Well, it will check all combo boxes but only return an error for one at a time. Presumably you call checkCbos() in your Save button 'click' procedure? The function will set an error provider on the first combo box that contains "" and then exit the function. If you select an item and then click your Save button again, you will be notified of any further combos containing "". This way, if you added another combo box at any time, the code will still work. The way you have done it is fine but would fail if you added another combo at any time. If it works for you though, that's great! Steve