When you serialize a class extra data is written to tell the runtime what type of object is being serialized. I have no idea if MS put this functionality in but you can look to see if you can work something up between the StructLayout attribute (normally set to Sequential) and the MarshalAs attribute. Then try getting a byte[] array with that data. I just thought of a hack that might work; create a struct, with the first and last elements being an int containing magic numbers; serialize the data to a MemoryStream, then retrieve the bytes from it, using only the data between your magic numbers to send across the wire. Like I said its a hack, and its entirely dependent on how the binary formatter serializes data (assuming it serializes the data in the same order it is in your struct). James Sonork ID: 100.11138 - Hasaki "I left there in the morning with their God tucked underneath my arm their half-assed smiles and the book of rules. So I asked this God a question and by way of firm reply, He said - I'm not the kind you have to wind up on Sundays." "Wind Up" from Aqualung, Jethro Tull 1971

There is an article that will provide you with a work around for your problem. hope it will help you "HOWTO: Alternative Implementation of ATL Singleton" The singleton implementation in this article works around this problem by returning a marshaled pointer in IClassFactory::CreateInstance(). Famous Last Words: "TRUCK!!!"

First of all, the lounge is not the place for these type of posts. You're better off asking this question in one of the forums. But since we're on the subject, let's discuss a few choices. You can either: -- char *pStr = new char[200] strcpy(pStr, "hello world"); ... SendMessage(hWnd, (WPARAM)pStr, NULL) In the message handler you simply char * const pStr = (char *)wParam; delete [] pStr; -- As an alternative, if you strings are <255 characters, you can use AddAtom() and DeleteAtom() to have Windows manage memory for you. Use GlobalAddAtom() and GlobalDeleteAtom() if you're sending the message to a window of a different application. -Oz --- Grab WndTabs from http://www.wndtabs.com to make your VC++ experience that much more comfortable...

From the topic 'Strings in MFC' (from VC5.0 documentation, YMMV): "A CString object can store up to INT_MAX (2,147,483,647) characters. "