Win2D "Hello, World!" quickstart

In this topic you'll create a very simple "Hello, World!" project for Win2D.

In Visual Studio, create a new project from one of the following project templates:

• WinUI 3 (Windows App SDK). To create a new WinUI 3 project, use the Blank App, Packaged (WinUI 3 in Desktop) project template. You can find that project template by choosing language: either C# or C++; platform: Windows; project type: Desktop.
• Universal Windows Platform (UWP). To create a new UWP project, use the Blank App (Universal Windows) or Blank App (C++/WinRT) or Blank App (Universal Windows - C++/CX) project template. For language, choose: either C# or C++; platform: Windows; project type: UWP.

To host Win2D content, you'll need to add a Win2D CanvasControl to your project's MainWindow.xaml (or MainPage.xaml, for a UWP project).

First, add the following xml namespace declaration:

xmlns:win2dcanvas="using:Microsoft.Graphics.Canvas.UI.Xaml"

And then add a CanvasControl, prefixed with that xml namespace. For example, you could add a Grid as your layout root, like this:

<Grid>
    <win2dcanvas:CanvasControl Draw="CanvasControl_Draw" ClearColor="CornflowerBlue"/>
</Grid>

The project won't build at the moment, due to the referenced-but-not-implemented Draw event handler. So we'll remedy that next, while we add some drawing code to interact with the CanvasControl.

For a WinUI 3 (Windows App SDK) project

For a C# project, add the following event handler to MainWindow.xaml.cs:

// MainWindow.xaml.cs
...
public sealed partial class MainWindow : Window
{
    ...
    void CanvasControl_Draw(
        Microsoft.Graphics.Canvas.UI.Xaml.CanvasControl sender,
        Microsoft.Graphics.Canvas.UI.Xaml.CanvasDrawEventArgs args)
    {
        args.DrawingSession.DrawEllipse(155, 115, 80, 30, Microsoft.UI.Colors.Black, 3);
        args.DrawingSession.DrawText("Hello, Win2D World!", 100, 100, Microsoft.UI.Colors.Yellow);
    }
}
...

For a C++/WinRT project, add the following event handler to MainWindow.xaml.h and MainWindow.xaml.cpp:

// MainWindow.xaml.h
...
void CanvasControl_Draw(
    winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl const& sender,
    winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs const& args);
...

// MainWindow.xaml.cpp
...
namespace winrt::MYPROJECT::implementation
{
    ...
    void MainWindow::CanvasControl_Draw(
        winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl const& sender,
        winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs const& args)
    {
        args.DrawingSession().DrawEllipse(155, 115, 80, 30, winrt::Microsoft::UI::Colors::Black(), 3);
        args.DrawingSession().DrawText(L"Hello, Win2D World!", 100, 100, winrt::Microsoft::UI::Colors::Yellow());
    }
}

You can now build and run the project. You'll see some Win2D content—a black ellipse with a yellow "Hello, World!" message in front of it.

For a UWP project

For a C# project, you can use the same C# code as for a WinUI 3 project (see the For a WinUI 3 project section above). The only differences are that you'll be editing MainPage.xaml.cs instead of MainWindow.xaml.cs. And you'll need to change Microsoft.UI.Colors to Windows.UI.Colors.

For a C++/WinRT project, add the following code to pch.h, MainPage.h, and MainPage.cpp:

// pch.h
...
#include <winrt/Microsoft.Graphics.Canvas.UI.Xaml.h>

// MainPage.h
...
void CanvasControl_Draw(
    winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl const& sender,
    winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs const& args);
...

// MainPage.cpp
...
namespace winrt::MYPROJECT::implementation
{
    ...
    void MainPage::CanvasControl_Draw(
        winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl const& sender,
        winrt::Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs const& args)
    {
        args.DrawingSession().DrawEllipse(155, 115, 80, 30, winrt::Windows::UI::Colors::Black(), 3);
        args.DrawingSession().DrawText(L"Hello, Win2D World!", 100, 100, winrt::Windows::UI::Colors::Yellow());
    }
}

For a C++/CX project, add the following event handler to MainPage.xaml.h and MainPage.xaml.cpp:

// MainPage.xaml.h
...
void CanvasControl_Draw(
	Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl^ sender,
	Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs^ args);
...

// MainWindow.xaml.cpp
...
void MainPage::CanvasControl_Draw(
    Microsoft::Graphics::Canvas::UI::Xaml::CanvasControl^ sender,
    Microsoft::Graphics::Canvas::UI::Xaml::CanvasDrawEventArgs^ args)
{
    args->DrawingSession->DrawEllipse(155, 115, 80, 30, Windows::UI::Colors::Black, 3);
    args->DrawingSession->DrawText("Hello, Win2D World!", 100, 100, Windows::UI::Colors::Yellow);
}

See Also

• Overview of Win2D
• Win2D quickstart