126.96.36.199.1 RopSetColumns ROP Request Buffer
PropertyTagCount (2 bytes): An unsigned integer that specifies the number of property tags in the PropertyTags field. This value MUST be 1 or greater.
PropertyTags (variable): An array of PropertyTag structures, as described in [MS-OXCDATA] section 2.9, that identify the set and order of property values to be returned by the server in the ROP response buffer of the RopQueryRows ([MS-OXCROPS] section 188.8.131.52), RopFindRow ([MS-OXCROPS] section 184.108.40.206), and RopExpandRow ([MS-OXCROPS] section 220.127.116.11) ROPs, as specified in sections 18.104.22.168, 22.214.171.124, and 126.96.36.199, respectively.
Every table MUST have at least one column. If the property type is a multivalue property, and the client wants multivalue instances based on this property, it MUST also set the MultivalueInstance bit (0x2000), as specified in [MS-OXCDATA] section 188.8.131.52, of the PropertyTag structure. If the property type is not multivalued, it does not set the MultivalueInstance bit of the PropertyTag structure set