C++CLI でコードで作成したフォームにコードでコントロールを配置

using namespace System;
using namespace System::Windows::Forms;


ref class MyForm :public System::Windows::Forms::Form {


  System::Windows::Forms::Button^ m_button;
public:
  MyForm() {

    m_button = gcnew System::Windows::Forms::Button;

    m_button->Text = "hello";
    m_button->Location = System::Drawing::Point(10, 10);//位置変更
    m_button->Size = System::Drawing::Size(70, 30);//サイズ変更
    m_button->Click += gcnew EventHandler(this,&MyForm::ClickEvent);//イベントハンドラ追加

    this->Controls->Add(m_button);//フォームに配置

  }
  virtual ~MyForm() {

  }

  void ClickEvent(Object^ source, EventArgs^ e) {
    System::Windows::Forms::MessageBox::Show("hello pushed");
  }

};
 
[STAThread]
int main(array<String^>^ args)
{

  MyForm m;

  Application::Run(% m);
}