The Keywords property is a list of keywords for this message.
Property Keywords as String HRESULT get_KeyWords(BSTR* pVal); HRESULT put_KeyWords(BSTR Val);
This property is also available as the urn:schemas:mailheader:keywords field.
The keywords of a message can be useful for determining if the message is of interest to the reader, or for searching for relevant messages in a collection.
The string in the Keywords property can represent a single keyword or multiple keywords. A keyword string can optionally contain spaces, such as the following:
Multiple keywords in the list are separated by commas, as in the following example:
"operating systems,Windows NT,functions"
Because the comma is the delimiter of this field, a keyword cannot contain a comma. If you add a keyword that contains a comma, the result will be two keywords that are separated by the comma.
The default value of the Keywords property is an empty string.