hFile (HFILE) - input

The handle returned by a previous call to DosCreateNPipe, DosCreatePipe, DosDupHandle, or DosOpen.

ulrc (APIRET) - returns

Return Code.

DosClose returns one of the following values:

• NO_ERROR 2
  ERROR_FILE_NOT_FOUND
  5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  For a full list of error codes, see Errors.