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<pre>Bitfields for message request flags:
Bit(s)	Description	)
 0	async request
 1	reliable message
 2	flush receive buffer on overflow
 3	end of user message received
 4	vectored request (if set, send buffer contains buffer descriptors)
 5	connection-specific receive
 6	change to connection-specific receive mode
SeeAlso: <a href=../../it/30/33.html>#03330</a>,<a href=../../it/35/33.html>#03335</a>

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