Listing 6 Basic leak detection

void trace_leaks()
{
    PROCESS_HEAP_ENTRY  heapentry;
    HANDLE              hHeap   =   GetProcessHeap();

    heapentry.lpData    =   NULL;

    HeapLock(hHeap);
    while(HeapWalk(hHeap, &heapentry))
    {
        char    szMessage[201];

        wsprintf(   szMessage,
                    "Allocated block at %08x, size %d\n",
                    heapentry.lpData,
                    heapentry.cbData);
                    OutputDebugStringA(szMessage);
    }
    HeapUnlock(hHeap);
}