#include <malloc.h>
Remarks
These constants give the return value indicating status of the heap.
| Constant | Meaning |
| _HEAPBADBEGIN | Initial header information was not found or was invalid. |
| _HEAPBADNODE | Bad node was found, or heap is damaged. |
| _HEAPBADPTR | _pentry field of _HEAPINFO structure does not contain valid pointer into heap (_heapwalk routine only). |
| _HEAPEMPTY | Heap has not been initialized. |
| _HEAPEND | End of heap was reached successfully (_heapwalk routine only). |
| _HEAPOK | Heap is consistent (_heapset and _heapchk routines only). No errors so far; _HEAPINFO structure contains information about next entry (_heapwalk routine only). |