Hi John,

Refer to the following KB article to see if it resolves your error:

http://support.microsoft.com/default.aspx?scid=kb;en-us;309336&Product=ol2002


>I'm getting a invalid cast error with the following code. Does anybody know how to a reference to Outlook's namespace?
>
> Outlook.Application ol = new Outlook.Application();
> Outlook.NameSpace ns = ol.GetNamespace("MAPI");
>
>I'm running Office XP but have the old .NET. PIA is installed.
>
>TIA, John