C / C++ / MFC

// This is the main project file for VC++ application project 
// generated using an Application Wizard.

#include "stdafx.h"

#using <mscorlib.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>

__gc public class CppForm : public Form {
public:
	CppForm(){}
};
#include <tchar.h>
using namespace System;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;


// This is the entry point for this application
int _tmain(void)
{
    // TODO: Please replace the sample code below with your own.
    Console::WriteLine(S"forms World");
	Application::Run(new CppForm());
    return 0;
}

e:\vc7practice\CppForm\CppForm.cpp(10): error C2504: 'Form' : base class undefined

e:\vc7practice\CppForm\CppForm.cpp(25): error C2665: 'System::Windows::Forms::Application::Run' : none of the 3 overloads can convert parameter 1 from type 'CppForm __gc *'