Native Run-Time Checks Customization
For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.
When you compile with /RTC (run-time checks) or use the
runtime_checks pragma, the C run-time library provides native run-time checks. In some cases, you might want to customize run-time checking:
To route run-time check messages to a file or destination other than the default.
To specify an output destination for run-time check messages under a third-party debugger.
To report run-time check messages from a program compiled with a release version of the C run-time library. Release versions of the library do not use
_CrtDbgReportWto report run-time errors. Instead, they display an Assert dialog box for each run-time error.
To customize run-time error checking, you can:
Write a run-time error reporting function. For more information, see How to: Write a Run-Time Error Reporting Function.
Customize the error message destination.
Query for information about run-time check errors.
If you use
_CrtDbgReportW to report errors, you can use
_CrtSetReportMode to specify the destination of error messages.
If you use a custom reporting function, use
_RTC_SetErrorType to associate an error with a report type.
_RTC_NumErrors returns the number of error types detected by run-time error checks. To get a brief description of each error, you can loop from 0 to the return value of
_RTC_NumErrors, passing the iteration value to
_RTC_GetErrDesc on each loop. For more information, see _RTC_NumErrors and _RTC_GetErrDesc.