.NET 4.2 beta

Question

Hi,
I'd have a question related to the latest .Net release in what concerns the use of Memory Mapped Files mechanism that I have tried as an IPC between C and C# communication for string types. My question would be: how to correctly pick-up , in C#, a sequence of 4 bytes (previously copied in the shared memory buffer in C as a window handle), transform it in IntPtr and associate it to a child window in my C# program. If this is the right form I'll be back with the code.
Thanks