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Updated: December 2008

Sets a breakpoint on a particular line of code. (Used in debug mode only.)

void _CrtDbgBreak( void );

There is no return value.

The _CrtDbgBreak function sets a debug breakpoint on the particular line of code where the function resides. This function is used in debug mode only and is dependent on _DEBUG being previously defined.

For more information about using other hook-capable run-time functions and writing your own client-defined hook functions, see Writing Your Own Debug Hook Functions.

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.


Required header



Debug versions of C run-time libraries only.




December 2008

Added link to __debugbreak.

Customer feedback.