Control flags

The debug version of the Microsoft C run-time library uses the following flags to control the heap allocation and reporting process. For more information, see CRT debugging techniques.

Flag	Description
_CRTDBG_MAP_ALLOC	Maps the base heap functions to their debug version counterparts
_DEBUG	Enables the use of the debugging versions of the run-time functions
_crtDbgFlag	Controls how the debug heap manager tracks allocations

These flags can be defined with a /D command-line option or with a #define directive. When the flag is defined with #define, the directive must appear before the header file #include directive for the routine declarations.

See also

Global variables and standard types