The UserPermission object associates a set of permissions on the active document with a single user and an optional expiration date.
Assembly: office (in office.dll)
Represents a member of the active document's Permission collection.
Use the Add method of the Permission object to grant specific permissions on the active document to a new user, with an optional expiration date. Use the Remove method of the UserPermission object to remove a user and the user's permissions.
While some permissions granted through the user interface (such as msoPermissionPrint) apply to all users, you can use the UserPermission object to assign them on a per-user basis with per-user expiration dates.