I needed a solution for making an application which is native 32b to “discuss” with a 64b client.
The client is creating a shared memory in which some data is saved. The server needs to process the data.

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Here is how MSDN describes the problem:
Running 32-bit Applications (on 64-bit OS): http://msdn.microsoft.com/en-us/library/aa384249(VS.85).aspx

And my problem is addresses here:
http://msdn.microsoft.com/en-us/library/aa384203(VS.85).aspx

Interprocess Communication

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The following techniques can be used for communication between 32- and 64-bit applications:

* Handles to named objects such as mutexes, semaphores, and file handles can all be shared.
* Handles to windows (HWND) can be shared.
* RPC.
* COM LocalServers.
* Shared memory can be used if the contents of the shared memory are not pointer-dependent.
* The CreateProcess and ShellExecute functions can launch 32-bit and 64-bit processes from either 32-bit or 64-bit processes.
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