Windows C++ / Heap Flag

Code

bool Check()
{
#ifndef _WIN64
    PPEB pPeb = (PPEB)__readfsdword(0x30);
    PVOID pHeapBase = !m_bIsWow64
        ? (PVOID)(*(PDWORD_PTR)((PBYTE)pPeb + 0x18))
        : (PVOID)(*(PDWORD_PTR)((PBYTE)pPeb + 0x1030));
    DWORD dwHeapFlagsOffset = IsWindowsVistaOrGreater()
        ? 0x40
        : 0x0C;
    DWORD dwHeapForceFlagsOffset = IsWindowsVistaOrGreater()
        ? 0x44 
        : 0x10;
#else
    PPEB pPeb = (PPEB)__readgsqword(0x60);
    PVOID pHeapBase = (PVOID)(*(PDWORD_PTR)((PBYTE)pPeb + 0x30));
    DWORD dwHeapFlagsOffset = IsWindowsVistaOrGreater()
        ? 0x70 
        : 0x14;
    DWORD dwHeapForceFlagsOffset = IsWindowsVistaOrGreater()
        ? 0x74 
        : 0x18;
#endif // _WIN64

    PDWORD pdwHeapFlags = (PDWORD)((PBYTE)pHeapBase + dwHeapFlagsOffset);
    PDWORD pdwHeapForceFlags = (PDWORD)((PBYTE)pHeapBase + dwHeapForceFlagsOffset);
    return (*pdwHeapFlags & ~HEAP_GROWABLE) || (*pdwHeapForceFlags != 0);
}