The DCIReturn
structure has been written to the output buffer.
DCI_NOTINITIALIZED
The requester has not yet
initialized the DCI.
DCI_SYSERROR
A internal error has occurred
(such as a shortage of resources) that may be beyond the control of the
application.
DCI_INVALIDARG
One of the input arguments
is invalid. For example, a negative value was used for numIds or
bufferSize. Also, either metricIdList could not be read or
the buffer could not be written to bufferAddress.