DDCMD_READ - Description

This message performs a read from the device into a buffer.

pParmIn (PDDCMDREADWRITE)

A pointer to a DDCMDREADWRITE data structure.

rc (ULONG)

Error code indicating success or the type of failure:

NO_ERROR

Success.
ERROR_INVALID_FUNCTION
Illegal function requested.
ERROR_INVALID_STREAM
Invalid stream handle.
ERROR_INVALID_BLOCK
Invalid address passed in parameter block.
FAILURE
Device-driver-specific error return code.

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