1 using System;
 2 using System.Windows;
 3 
 4 class HelloWindow : Window
 5 {
 6     public HelloWindow() : base("Hello"), numHellos(0), color(0u, 0x5au, 0xb4u), brush(color), fontFamily(FontFamily.GenericSansSerif()), font(fontFamily, 14.0f)
 7     {
 8         Size s = GetSize();
 9         Size defaultButtonSize = ScreenMetrics.Get().DefaultButtonSize();
10         Size defaultControlSpacing = ScreenMetrics.Get().DefaultControlSpacing();
11         int x = s.w - defaultButtonSize.w - defaultControlSpacing.w;
12         int y = s.h - defaultButtonSize.h - defaultControlSpacing.h;
13 
14         UniquePtr<Button> helloButton(new Button(ButtonCreateParams(ButtonControlCreateParams(
15             ControlCreateParams().SetText("Hello").SetLocation(Point(x, y)).SetSize(defaultButtonSize).
16             SetAnchors(cast<Anchors>(Anchors.bottom | Anchors.right))))));
17         helloButton->ClickEvent().AddHandler(HelloButtonClick);
18         AddChild(helloButton.Release());
19         PaintEvent().AddHandler(Paint);
20     }
21     private void HelloButtonClick()
22     {
23         ++numHellos;
24         Invalidate();
25     }
26     private void Paint(PaintEventArgs& args)
27     {
28         try
29         {
30             PointF origin(10.0f, 10.0f);
31             for (int i = 0; i < numHellos; ++i;)
32             {
33                 args.graphics.DrawStringChecked("Hello, World!", font, origin, brush);
34                 origin.y = origin.y + font.GetHeight(args.graphics);
35             }
36         }
37         catch (const Exception& ex)
38         {
39             MessageBox.Show(ex.Message(), "Error", this, cast<MessageBoxType>(MessageBoxType.MB_OK | MessageBoxType.MB_ICONSTOP));
40         }
41     }
42     private int numHellos;
43     private Color color;
44     private SolidBrush brush;
45     private FontFamily fontFamily;
46     private Font font;
47     private Button* helloButton;
48 }
49 
50 int main()
51 {
52     try
53     {
54         HelloWindow helloWindow;
55         return Application.Run(helloWindow);
56     }
57     catch (const Exception& ex)
58     {
59         MessageBox.Show(ex.Message(), "Error", null, cast<MessageBoxType>(MessageBoxType.MB_OK | MessageBoxType.MB_ICONSTOP));
60         try
61         {
62             System.IO.StreamWriter errorWriter = System.IO.File.CreateText("error.txt");
63             errorWriter << ex.ToString() << endl();
64         }
65         catch (const Exception& innerEx)
66         {
67         }
68         return 1;
69     }
70     return 0;
71 }