grbit (4 bytes): An unsigned integer that specifies the type of the variant data stored in rdtVt. MUST be a value from the following table:
rtdVt Data Type
The returned variant is an Xnum (section 2.5.342).
The returned variant is a RTDOperStr. MUST be less than 256 characters long.
The returned variant is a 4-byte Boolean (section 2.5.14) value.
The returned variant is a 4-byte signed integer indicating an error code.
The returned variant is a 4-byte signed integer used for purposes other than an error code.
The returned variant is a RTDOperStr. MUST be greater than or equal to 256 characters long.
rtdVt (variable): A structure that contains the variant data. The meaning of the data depends on the specific RTD server. The type of the variant data is specified by grbit.