Managed C++/CLI

class alpha<br />
{<br />
  int alpha_value;<br />
public:<br />
  alpha() { std::cout << "\nCalled constructor for alpha"; }<br />
  alpha(const alpha&) { std::cout << "\nCalled copy constructor for alpha";}<br />
};<br />
<br />
<br />
class combined<br />
{<br />
  alpha a;<br />
public:<br />
  combined() {std::cout << "\nCalled constructor for combined}";}<br />
  combined(alpha& a1): a(a1) { std::cout << "\nThree argument Constructor Called for combined"; }<br />
};<br />
<br />
<br />
int main()<br />
{<br />
  alpha a;<br />
  combined d = combined(a);<br />
  return 0;<br />
}

<br />
#pragma once<br />
<br />
using namespace System;<br />
using namespace System::Windows::Forms;<br />
<br />
namespace ProjectX {<br />
<br />
	public ref class EnterComboBox : public ComboBox {<br />
<br />
	public:<br />
<br />
		EnterComboBox(void) {<br />
		}<br />
<br />
	protected:<br />
<br />
		virtual void ComboBox::ProcessCmdKey(Message^% msg, Keys^ k) override {<br />
<br />
			MessageBox::Show("cmdkey");<br />
<br />
			ComboBox::ProcessCmdKey(&msg, k);<br />
		}<br />
	};<br />
}<br />