DDCMD_CONTROL Return Value - rc

rc (ULONG)

Error code indicating success or the type of failure:

NO_ERROR

Success.
ERROR_INVALID_FUNCTION
Illegal function requested.
ERROR_INVALID_REQUEST
Device driver does not support events. (Returned when ulCmd of DDCMDCONTROL is set to DDCMD_ENABLE_EVENT.)
ERROR_INVALID_STREAM
Invalid stream handle.
ERROR_INVALID_SEQUENCE
Invalid device control command.
ERROR_INSUFF_BUFFER
The device driver does not have buffers to perform the requested action.
ERROR_STREAM_NOT_STARTED
The stream cannot perform the requested action unless the stream has been started.
ERROR_TOO_MANY_EVENTS
The stream handler attempted to enable too many events.
FAILURE
Device-driver-specific error return code.

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