ulrc (APIRET) - returns

Return Code.

DosRequestMutexSem returns one of the following values:

• NO_ERROR
  
• ERROR_INVALID_HANDLE
  95
  ERROR_INTERRUPT
  103
  ERROR_TOO_MANY_SEM_REQUESTS
  105
  ERROR_SEM_OWNER_DIED
  640
  ERROR_TIMEOUT
  For a full list of error codes, see Errors.