flag (BOOL32) - input

      Focus flag.

      This parameter may have either of two values:

    • SIG_UNSETFOCUS
      Stop receiving signals.

    • SIG_SETFOCUS
      Start receiving signals.

    pulTimes (PULONG) - output

      The number of times DosSetSignalExceptionFocus has been called by the current process with flag set to SIG_SETFOCUS, minus the number of times it has been called with flag set to SIG_UNSETFOCUS.

    ulrc (APIRET) - returns

      Return Code.

      DosSetSignalExceptionFocus returns one of the following values:

    • NO_ERROR 1
        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.

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