Managed C++/CLI

<br />
   void textBox1_KeyPress( Object^ /*sender*/, System::Windows::Forms::KeyPressEventArgs^ e )<br />
   {<br />
      if(e->KeyCode == Key::Enter)  // if press key is enter<br />
        Result();                   // my function<br />
  }<br />

ref class CFoo
{
  public:
    String^ text;

    CFoo(void)
    {
      this->text = "";
    }

    CFoo(const CFoo^ _cpy)
    {
      this->text = _cpy->text;
    }

    void operator=(const CFoo^ _rhs)
    {
       this->text = _rhs->text;
    }
};

int main(void)
{
  CFoo^ foo1 = gcnew CFoo();
  CFoo^ foo2 = gcnew CFoo();

  foo1->text = "Bill";
  foo2 = foo1;
  foo1->text = "Bob";

  return 0;
}

foo2 = foo1;

foo2->operator =(foo1);

foo2 = gcnew CFoo(foo1);

// EXAMPLE 1: C#
using System;

namespace ManagedCode {
    public static class DateTimeExtension {
        public static double Foo(this DateTime dt) {
            return 83.5;
        }
    }
}

#using "ManagedCode.dll"
#using <mscorlib.dll>
#using <system.dll>

using namespace ManagedCode;
using ManagedCode::DateTimeExtension;
using System::DateTime;

public int main(void) {
    DateTime foo;
    double temp = foo.Foo();
    return 0;
}

// Example 2: C++
#using <mscorlib.dll>
#using <system.dll>

class DateTime : public System::DateTime {
public:
    DateTime();
    double Foo();
};

// Example 3: C++
#using <mscorlib.dll>
#using <system.dll>

ref class DateTime : public System::DateTime {
protected:
    ~DateTime();
public:
    DateTime();
    !DateTime();
    double Foo();
};