#include <stdlib.h>
Remarks
These constants define the maximum length for the path and for the individual fields within the path.
| Constant | Meaning |
| _MAX_DIR | Maximum length of directory component |
| _MAX_DRIVE | Maximum length of drive component |
| _MAX_EXT | Maximum length of extension component |
| _MAX_FNAME | Maximum length of filename component |
| _MAX_PATH | Maximum length of full path |
The sum of the fields should not exceed _MAX_PATH.