Retrieve the value of a MIME X-Field associated with a message. X-FIELD’s are set on messages that are delivered to GroupWise by way of the Internet or set manually by the ItemAddMimeXField() call.
AFTKN_ITEM_GET_MIME_XFIELD or 931
ANSISTRING ItemGetMimeXField( ANSISTRING MessageID; WORD Index)
Unique item identifier, returned by ItemMessageIDFromView().
The 0-based index of the X-FIELD to retrieve.