First you create the HwndSourcegiving it parameters similar to CreateWindow. This walkthrough illustrates how to create a mixed WPF inside Win32 application that reimplements the operating system Date and Time Properties dialog. This tutorial concentrates on the important steps of producing an interoperation application.Give a modern look and feel to your Windows desktop applications with UWP and XAML - THR2326
The tutorial is backed by a sample, Win32 Clock Interoperation Samplebut that sample is reflective of the end product. This tutorial documents the steps as if you were starting with an existing Win32 project of your own, perhaps a pre-existing project, and you were adding a hosted WPF to your application.
You can compare your end product with Win32 Clock Interoperation Sample. The first step is to turn this unmanaged Win32 project into one that can call managed code.
Walkthrough: Host a Win32 Control in WPF
Following instructions assume the operating system is installed on C: drive. Right-click win32clock project and select References Repeat for PresentationFramework.
Repeat for WindowsBase. Repeat for UIAutomationTypes. Repeat for UIAutomationProvider. Once done, that project can be turned into a DLL by right-clicking the project, clicking on Propertiesgoing to the Application, and changing Output type to Windows Class Library. This is a long piece of code that could use some explanation. The first part is various clauses so that you do not need to fully qualify all the calls:.
First you create an HwndSourcewhose parameters are similar to CreateWindow:. You then connect the page to the HwndSource :. If you knew just where to put the HWND, you would just pass that size and location to the GetHwnd function you defined earlier.
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But what I want to do is have a WPF window as main window, and not just any old window but a prism shell window. And in there I want to put some commands which open the legacy win32 windows when they are needed. The win32 window will need a message pump loop, but where do I put this:. Have you seen this? As you will see there is a host window which will contain the control. The host window can also contain self painted content or whatever you want.
You have to override WndProc from HwndHost. May be it is possible to forward to your native handler from that. Have not done that yet. Learn more.
Walkthrough: Hosting WPF Content in Win32
Hosting win32 windows in a WPF app? Ask Question. Asked 9 years, 4 months ago. Active 9 years, 4 months ago. Viewed 3k times. Or is there an interop helper for this, too? Or is my idea plain insane? Sam Sam Time to flip the switch perhaps. Make a WPF app your main one. Active Oldest Votes. As Tergiver pointed out there is no need for a message pump. Cool, good stuff - but this is for hosting a win32 control in a WPF window, not?
I want to open a rather standalone win32 window, and don't really understand yet, how this would have to be applied. But I got a starting point now, thanks! There is also a solution for hosting a wpf-page in a win32 hwnd on the same page.However, when you have a substantial investment in Win32 code, it might be more effective to add WPF functionality to your application rather than rewriting your original code.
You can extend this sample to host any Win32 window. This tutorial assumes a basic familiarity with both WPF and Win32 programming. For an introduction to Win32 programming, you should reference any of the numerous books on the subject, in particular Programming Windows by Charles Petzold.
This tutorial includes a number of code examples from the associated sample. However, for readability, it does not include the complete sample code.
Host UWP XAML controls in desktop apps (XAML Islands)
This section outlines the basic procedure you use to host WPF content in a Win32 window. The remaining sections explain the details of each step. This class wraps the WPF content in a Win32 window, allowing it to be incorporated into your user interface UI as a child window. The following approach combines the Win32 and WPF in a single application.
Create a new HwndSource object with the parent window as its parent parameter. Get the HWND for the content. Implement a managed class that contains a static field to hold a reference to your WPF content.
This class allows you to get a reference to the WPF content from your Win32 code. Communicate with the WPF content by using the reference that you stored in the static field to set properties, and so on.
The remainder of the procedure is similar to that outlined above. This section describes how to host WPF content in a basic Win32 application. For the most part, it is straightforward WPF programming. Communicating with the WPF Content.
A menu with File and Help headings. The File menu has an Exit item that closes the application. The Help menu has an About item that launches a simple dialog box. Before you start writing code to host the WPF content, you need to make two modifications to the basic template.
The first is to compile the project as managed code. By default, the project compiles as unmanaged code. However, because WPF is implemented in managed code, the project must be compiled accordingly.
Right-click the project name in Solution Explorer and select Properties from the context menu to launch the Property Pages dialog box. This compiler flag allows you to use managed code in your application, but your unmanaged code will still compile as before. In order to work properly with the WPF content code, you must set the application's threading model to STA by applying an attribute to the entry point. The WPF content is a simple address entry application.You can host any UWP control that derives from Windows.
WPF and Win32 Interoperation
UIElementincluding:. Win32 repo and leave your comments there. If you prefer to submit your feedback privately, you can send it to XamlIslandsFeedback microsoft. Your insights and scenarios are critically important to us.
These controls provide an object model that mimics or provides access to the properties, methods, and events of the corresponding UWP controls. They also handle behavior such as keyboard navigation and layout changes. For custom controls and other scenarios beyond those covered by the available wrapped controls, WPF and Windows Forms applications can also use the WindowsXamlHost control that is available in the Windows Community Toolkit.
NET Core 3. NET Framework or. NET controls require Windows 10, versionor a later version. To use these controls, install one of the NuGet packages listed below.
These packages provide everything you need to use the XAML Island wrapped controls and host controls, and they include other related NuGet packages that are also required. The host control packages are also included in the wrapped control packages.
You can install the wrapped control packages if you want to use both sets of controls. Hosting custom UWP controls is not supported in apps that target the. NET Framework. You'll also need to perform some additional steps to reference the custom control. The Windows Community Toolkit also provides the following. These controls are often used in similar desktop app modernization scenarios as the XAML Island controls, and they are maintained in the same Microsoft. For more information about this API, see the following articles.
The wrapped controls and host controls are available via NuGet packages in the Windows Community Toolkit. Instead, use the XamlRoot class. For more information, see this section. You'll have to declare the data model in a. NET Standard library. This scenario is only supported in apps that target. Content does respond to high contrast changes at run time. For more information about this feature, see this article.
If you do this, the input control will not properly respond to key presses. To achieve similar functionality using a XAML Island, we recommend that you host a Popup that contains the input control.This article describes hosting of a Win32 user control in a WPF window. It is supplemented by the following two projects, which show working examples of the material presented in the document:. The only difference between the two projects is the Win32ListBoxHost.
You can view the differences between the two versions of the file by using a utility such as WinDiff.
In traditional Win32 programming, user controls buttons, listboxes, etc. Every control has a unique per session identifier of type HWND  and is recognized as a separate window albeit a child window by the window manager of the OS. What this means is that the window manager of the OS has the ability to do hit-testing  of the user control without the assistance of the parent window and is thus capable of sending window messages e.
These window messages are typically intercepted and processed by the message loop of the parent window, but can also be processed by the user control.
Hit-testing is accomplished by the Visual layer in the WPF stack. You use the BuildWindowCore to instantiate the Win32 user control you want to host. For example, if your HwndHost-derived class is wrapping a Win32 listbox, then it probably makes sense to expose basic listbox methods such as:. In a traditional Win32 application, you display a number of Win32 user controls in a top-level Win32 window. The top-level window is typically handling all window messages resulting from interaction of the user with the controls through a top-level WindowProc.
As a result, in the code below would not really work as expected:. In other words you end up with the following general structure:. With the code above we can capture and process the window messages sent to the hosted Win32 user control.
We do that in the WndProc method. In addition to that we need to be able to inform interested WPF elements of the fact that we have received a certain event. For example, a hosted Win32 button may need to inform a WPF textbox that is has been clicked, a hosted Win32 listbox may need to inform a WPF textbox that the selection in the listbox has been changed, etc.
The traditional way to do expose that capability in. NET is through events. One current problem that you will see in the application is that keyboard navigation does not work well with the Win32 control. Keyboard navigation has several aspects:. In this particular case, the implementation of TabInto is trivial because we only have a single Win32 control:.
We use the method to intercept pressing of the up and down arrow so that we can change the selected item in the hosted Win32 listbox:. The only thing that remains is supporting access keys also known as mnemonics.Win32 repo and leave your comments there.
If you prefer to submit your feedback privately, you can send it to XamlIslandsFeedback microsoft. Your insights and scenarios are critically important to us. Some types of desktop apps have the option of using alternative, more convenient APIs to accomplish this goal. There are no alternatives for these types of apps. To help illustrate how to use this API in the context of a complete app, this article refers to code from the following samples. XAML Island with custom control sample.
The source code is available at the following locations:. For the WPF version of the control, go here. The WPF version derives from System. For the Windows Forms version of the control, go here. The Windows Forms version derives from System. The following diagram illustrates the hierarchy of objects in a XAML Island that is hosted in a desktop app. Control for Windows Forms apps. At the next level is a DesktopWindowXamlSource object. Your code is responsible for creating this object and attaching it to the parent UI element.
This native child window is mostly abstracted away from your code, but you can access its handle HWND if necessary. Finally, at the top level is the UWP control you want to host in your desktop app. This can be any UWP object that derives from Windows. For more information, see this section. To resolve this issue, either create an MSIX package for the app and run it from the package, or install the Microsoft. SDK NuGet package in your project.
You must pass this method the HWND of a window that was created on the same thread as the code from which you are calling the method. After your application calls AttachToWindow on a particular thread, all other DesktopWindowXamlSource objects on the same thread can only attach to windows that are descendants of the same top-level window that was passed in the first call to AttachToWindow.
When all the DesktopWindowXamlSource objects are closed for a particular thread, the next DesktopWindowXamlSource is then free to attach to any window again. To resolve this issue, either close all DesktopWindowXamlSource objects that are bound to other top-level windows on this thread, or create a new thread for this DesktopWindowXamlSource.
Yes No Any additional feedback?This topic provides an overview of how to interoperate WPF and Win32 code. However, when you have a substantial investment in Win32 code, it might be more effective to reuse some of that code.
Host WPF content in a Win32 window. With this technique, you can use the advanced graphics capabilities of WPF within the framework of a standard Win32 window and application. Host a Win32 window in WPF content. With this technique, you can use an existing custom Win32 control in the context of other WPF content, and pass data across the boundaries.
Each of these techniques is conceptually introduced in this topic. There are several project division techniques to compensate for this. This has a number of implications. Primarily, in order to mix these rendering models at all, you must create an interoperation solution, and use designated segments of interoperation for each rendering model that you choose to use. Also, the rendering behavior creates an "airspace" restriction for what your interoperation solution can accomplish.
The "airspace" concept is explained in greater detail in the topic Technology Regions Overview. An exception is menus, combo box drop downs, and other pop-ups. These elements create their own top-level window, which is why a WPF menu can potentially go past the edge of the window HWND that contains it.
This is also discussed in the topic Technology Regions Overview. The following approach combines the Win32 and WPF in a single application.
Implement your WPF content the content root element as a managed class. In subsequent steps, this class is referred to as the WPF content class, and instances of the class are referred to as WPF content objects. Implement a managed class that contains a static field that holds a reference to your WPF content object. This class allows you to get a reference to the WPF content object from your Win32 code, but more importantly it prevents your HwndSource from being inadvertently garbage collected.
Receive notifications from the WPF content object by attaching a handler to one or more of the WPF content object events.