[This is preliminary documentation and subject to change.]
The Name property returns or sets the display name of the Attachment object as a string. Read/write.
objAttach.Name
The Name property is the default property of an Attachment object, meaning that objAttach is syntactically equivalent to objAttach.Name in Microsoft® Visual Basic® code.
String
Before setting or changing the Name property, you should be sure that the Source property is already set. Setting Source after setting Name can result in an incorrect value for Name.
The Name property can also be set at the time of creation of the attachment by supplying the name parameter to the Add method of the Attachments collection.