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How to Marshal a C++ Class

, 15 Mar 2007
An article on how to marshal a C++ class
#include <STDIO.H>									// needed for NULL

#include "ExampleMCppBridge.h"
#include "ExampleUnmanagedDLL.h"

using namespace System::Runtime::InteropServices;	// needed for Marshal

	: m_pUnmanagedTestClass(NULL)
	this->m_pUnmanagedTestClass = new CUnmanagedTestClass();

	delete this->m_pUnmanagedTestClass;
	this->m_pUnmanagedTestClass = NULL;

void CExampleMCppBridge::PassInt(int nValue)

void CExampleMCppBridge::PassString(String^ strValue)
	IntPtr pString = Marshal::StringToHGlobalAnsi(strValue);
		char* pchString = static_cast<char *>(pString.ToPointer());

String^ CExampleMCppBridge::ReturnString()
	char* pchValue = this->m_pUnmanagedTestClass->ReturnString();
	String^ strValue = Marshal::PtrToStringAnsi(static_cast<IntPtr>(pchValue));
	return strValue;

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About the Author

Software Developer
United States United States
In a nutshell, my forte is Windows, Macintosh, and cross-platform development, and my interests are in UI, image processing, and MIDI application development.

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