I'm using the following code to try to retrieve ContactItems in Outlook:

Outlook.MAPIFolder defaultFolder = applicationObject.GetNamespace
("MAPI").GetDefaultFolder(Outlook.OlDefaultFolders .olFolderContacts);

foreach (Outlook.ContactItem item in defaultFolder.Items)
{
//codes......
}

However, there are also DistListItem in the same folder and the following
exception occured:

System.InvalidCastException: Unable to cast COM object of type
'System._ComObject' to interface type
'Microsoflt.Office.Interop.Outlook.ContactItem'. This operation failed
because the QueryInterface call on the COM component for the interface with
IID ......

Is there another way other than 'foreach' clause that I can get the
ContactItem or DistListItem in a Outlook folder?

Your post was already answered in another group you posted in. Please do not
post in multiple groups and look for responses to your original post.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"OctopusThu" wrote in message
...
I'm using the following code to try to retrieve ContactItems in Outlook:

Outlook.MAPIFolder defaultFolder = applicationObject.GetNamespace
("MAPI").GetDefaultFolder(Outlook.OlDefaultFolders .olFolderContacts);

foreach (Outlook.ContactItem item in defaultFolder.Items)
{
//codes......
}

However, there are also DistListItem in the same folder and the following
exception occured:

System.InvalidCastException: Unable to cast COM object of type
'System._ComObject' to interface type
'Microsoflt.Office.Interop.Outlook.ContactItem'. This operation failed
because the QueryInterface call on the COM component for the interface
with
IID ......

Is there another way other than 'foreach' clause that I can get the
ContactItem or DistListItem in a Outlook folder?