Debug versions of the _getdcwd, _wgetdcwd functions (only available during debug).
char *_getdcwd_dbg( int drive, char *buffer, int maxlen, int blockType, const char *filename, int linenumber ); wchar_t *_wgetdcwd_dbg( int drive, wchar_t *buffer, int maxlen, int blockType, const char *filename, int linenumber );
Returns a pointer to buffer. A NULL return value indicates an error, and errno is set either to ENOMEM, indicating that there is insufficient memory to allocate maxlen bytes (when a NULL argument is given as buffer), or to ERANGE, indicating that the path is longer than maxlen characters. For more information, see errno, _doserrno, _sys_errlist, and _sys_nerr.
The _getdcwd_dbg and _wgetdcwd_dbg functions are identical to _getdcwd and _wgetdcwd except that, when _DEBUG is defined, these functions use the debug version of malloc and _malloc_dbg to allocate memory if NULL is passed as the buffer parameter. For more information, see _malloc_dbg.
You do not need to call these functions explicitly in most cases. Instead, you can define the _CRTDBG_MAP_ALLOC flag. When _CRTDBG_MAP_ALLOC is defined, calls to _getdcwd and _wgetdcwd are remapped to _getdcwd_dbg and _wgetdcwd_dbg, respectively, with the blockType set to _NORMAL_BLOCK. Thus, you do not need to call these functions explicitly unless you want to mark the heap blocks as _CLIENT_BLOCK. For more information, see Types of Blocks on the Debug Heap.
_UNICODE and _MBCS not defined
For more compatibility information, see Compatibility in the Introduction.