ulrc (APIRET) - returns

Return Code.

DosSetSignalExceptionFocus returns one of the following values:

• NO_ERROR
  
• ERROR_INVALID_FUNCTION
  300
  ERROR_ALREADY_RESET
  303
  ERROR_INVALID_PROCID
  650
  ERROR_NESTING_TOO_DEEP
  For a full list of error codes, see Errors.