GlobalAllocPtr () always returns the same address for different processes

I have an application that can be run several times at the same time on Windows.

In this application, we first call GlobalAllocPtr () to allocate memory, as shown below:

// allocate a structure
LPSlcDataMgr lpMgr = (LPSlcDataMgr)GlobalAllocPtr(GHND, sizeof(TSlcDataMgr));

We tested on two machines (both XP professional 2002, one SP2, the other SP3), but in SP3 our applications will crash randomly

After the study, we found:

• in SP3, it GlobalAllocPtr()always returns the same address for different application processes.
• but on SP2 this is normal, it returns a different address for each process.

Is it possible that GlobalAllocPtr()the same address on WinXP SP3 returns a direct or indirect cause of our failure?

Thanks in advance.