Mega Code Archive

 

Categories / Visual C++ .NET / Network

 

Class Marshal

#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)); }