Visual C++ .NET/2D/Region

Region Demo

<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)
   {
     InitializeComponent();
           Drawing::Point point1 = Drawing::Point(25,25);
           Drawing::Point point2 = Drawing::Point(100,100);
           Drawing::Size size    = Drawing::Size(200, 150);
           Rectangle rect1       = Drawing::Rectangle(point1, size); 
           Rectangle rect2       = Drawing::Rectangle(point2, size);
           region = gcnew Drawing::Region(rect1);
           region->Xor(rect2);
   }
       Drawing::Region ^region;
   void InitializeComponent(void)
   {
           this->SuspendLayout();
           this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
           this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
           this->ClientSize = System::Drawing::Size(322, 273);
           this->Name = L"Form1";
           this->Text = L"Filling A Region";
           this->Paint += 
               gcnew System::Windows::Forms::PaintEventHandler(this, 
                                                        &Form1::Form1_Paint);
           this->ResumeLayout(false);
   }
       System::Void Form1_Paint(System::Object^ sender, 
                                System::Windows::Forms::PaintEventArgs^ e)
       {
           e->Graphics->FillRegion(Brushes::Blue, region);
       }
 };

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

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

}

 </source>