ulrc (APIRET) - returns

Return Code.

DosPeekQueue returns one of the following values:

• NO_ERROR
  87
  ERROR_INVALID_PARAMETER
  330
  ERROR_QUE_PROC_NOT_OWNED
  333
  ERROR_QUE_ELEMENT_NOT_EXIST
  337
  ERROR_QUE_INVALID_HANDLE
  340
  ERROR_QUE_PREV_AT_END
  342
  ERROR_QUE_EMPTY
  433
  ERROR_QUE_INVALID_WAIT
  For a full list of error codes, see Errors.