2.2.2.1 TRANSFER_TYPE
The TRANSFER_TYPE enumeration specifies the valid cases for the unnamed union defined in the CACTransferBufferV1 structure (section 2.2.3.2).
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typedef enum { CACTB_SEND = 0, CACTB_RECEIVE, CACTB_CREATECURSOR } TRANSFER_TYPE;
CACTB_SEND: A send operation (that is, a message placed into a queue for delivery) is to be performed.
CACTB_RECEIVE: A receive operation (that is, a message is to be read from a queue) is to be performed.
CACTB_CREATECURSOR: A cursor creation is to be performed.