| Name | Description | |
|---|---|---|
| Add | Add an item to the end of the collection. | |
| AddDataBinary | Add an item to the end of the collection. | |
| AddDataFromFile | Add an item to the end of the collection. | |
| AddDataString | Add an item to the end of the collection. | |
| AddList | Add a list of attachments. | |
| AppendMessageAttachments | Append entries from another ISMessageAttachments collection. | |
| Clear | Clear collection. | |
| CreateMessageAttachment | Create an ISMessageAttachment object. | |
| New System Use Only |