Visual C++ .NET/GUI Form/Form

OnPaint

<source lang="csharp">

 using namespace System;
 using namespace System::ComponentModel;
 using namespace System::Collections;
 using namespace System::Windows::Forms;
 using namespace System::Data;
 using namespace System::Drawing;
 public ref class Form1 : public System::Windows::Forms::Form
 {
 public:
   Form1(void)
   {
           this->SuspendLayout();
           this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
           this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
           this->ClientSize = System::Drawing::Size(292, 273);
           this->Name = L"Form1";
           this->Text = L"Form1";
           this->Paint += 
               gcnew System::Windows::Forms::PaintEventHandler(this, 
                                                          &Form1::Form1_Paint);
           this->ResumeLayout(false);
   }
       virtual void OnPaint(System::Windows::Forms::PaintEventArgs ^e) override
       {

// Form::OnPaint(e);

           e->Graphics->DrawString("Hello GDI+", 
              gcnew Drawing::Font("Arial", 16), Brushes::Black, 75.0, 110.0);
           Form::OnPaint(e);
       }
       System::Void Form1_Paint(System::Object^ sender,
                                System::Windows::Forms::PaintEventArgs^ e)
       {
           e->Graphics->DrawString("Hello GDI+", 
               gcnew Drawing::Font("Arial", 16), Brushes::Purple, 75.0, 110.0);
       }
 };

[STAThreadAttribute] int main(array<System::String ^> ^args) {

 Application::Run(gcnew Form1());
 return 0;

}

 </source>

subclass Form

<source lang="csharp">

[STAThreadAttribute] int main(array<System::String ^> ^args) {

 Application::Run(gcnew Form1());
 return 0;

}

 using namespace System;
 using namespace System::ComponentModel;
 using namespace System::Collections;
 using namespace System::Windows::Forms;
 using namespace System::Data;
 using namespace System::Drawing;

 public ref class Form1 : public System::Windows::Forms::Form
 {
 public:
   Form1(void)
   {
     InitializeComponent();
   }

 private:
   System::ComponentModel::Container ^components;
   void InitializeComponent(void)
   {
     this->SuspendLayout();
     // 
     // Form1
     // 
     this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
     this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
     this->BackColor = System::Drawing::Color::Black;
     this->ClientSize = System::Drawing::Size(692, 276);
     this->Cursor = System::Windows::Forms::Cursors::UpArrow;
     this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::SizableToolWindow;
     this->Name = L"Form1";
     this->SizeGripStyle = System::Windows::Forms::SizeGripStyle::Show;
     this->Text = L"Custom Hello";
     this->TopMost = true;
     this->ResumeLayout(false);
   }
 };
  
 </source>