Visual C++ .NET/Network/Marshal

Class Marshal

<source lang="csharp">

1. include "stdafx.h"

using namespace System; using namespace System::Runtime::InteropServices; [StructLayout(LayoutKind::Sequential)] value class vRec { public:

   int width;
   int height;

   vRec(int iwidth, int iheight)
   {
       width = iwidth;
       height = iheight;
   }

}; [StructLayout(LayoutKind::Sequential)] ref class rRec { public:

   int width;
   int height;
   rRec(int iwidth, int iheight)
   {
       width = iwidth;
       height = iheight;
   }

}; // By value [DllImportAttribute("NativeCode.dll")] extern "C" bool vIsSquare(vRec rec); // by reference [DllImportAttribute("NativeCode.dll")] extern "C" bool rIsSquare(rRec^ rec); void main() {

   // By Value
   vRec vrec(2,3);
   Console::WriteLine("value class rec a square? {0}", vIsSquare(vrec));
   // By Reference
   rRec ^rrec = gcnew rRec(3,3);
   Console::WriteLine("ref class rec a square? {0}", rIsSquare(rrec));

}

 </source>