2.2.6.1 Marshaled Data
This field contains the binary representation of the marshaled method parameters. The binary format is based on either the Network Data Representation (NDR) format, defined in [C706], or the dispatch format (defined in [MS-OAUT] section 3.1.4.4.2) with two exceptions defined in section 2.2.6.1.4 and section 2.2.6.1.5.
If the ID in the method header is set to IID_IDispatch (as defined in [MS-OAUT] section 1.9), the dispatch marshaling format MUST be used. Otherwise, the NDR format MUST be used.