Category Wpf get window handle

Wpf get window handle

The MainWindowHandle is not defined because the process has exited. You are trying to access the MainWindowHandle property for a process that is running on a remote computer. This property is available only for processes that are running on the local computer. The main window is the window opened by the process that currently has the focus the TopLevel form. You must use the Refresh method to refresh the Process object to get the current main window handle if it has changed.

In general, because the window handle is cached, use Refresh beforehand to guarantee that you'll retrieve the current handle. You can get the MainWindowHandle property only for processes that are running on the local computer. The MainWindowHandle property is a value that uniquely identifies the window that is associated with the process. A process has a main window associated with it only if the process has a graphical interface. If the associated process does not have a main window, the MainWindowHandle value is zero.

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The value is also zero for processes that have been hidden, that is, processes that are not visible in the taskbar. This can be the case for processes that appear as icons in the notification area, at the far right of the taskbar. If you have just started a process and want to use its main window handle, consider using the WaitForInputIdle method to allow the process to finish starting, ensuring that the main window handle has been created. Otherwise, an exception will be thrown.

Skip to main content. Contents Exit focus mode. Diagnostics Assembly: System. Gets the window handle of the main window of the associated process.

Is this page helpful? Yes No. Any additional feedback? Skip Submit.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.

wpf get window handle

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.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

wpf get window handle

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Windows forms had a property win1. Handle which, if I recall, returns the handle of the main window handle? Well, instead of passing Application. MainWindowjust pass a reference to whichever window it is you want: new WindowInteropHelper this. Handle and so on. Right now, you're asking for the Application's main window, of which there will always be one.

You can use this same technique on any Window, however, provided it is a System. Window derived Window class. If you want window handles for ALL of your application's Window s for some reason, you can use the Application.

Windows property to get at all the Windows and then use WindowInteropHandler to get at their handles as you have already demonstrated. Learn more. Asked 11 years ago. Active 8 years, 5 months ago. Viewed k times. Is there an equivalent way to get the handle of a WPF Window? Handle; but I don't think that will help me because my application has multiple windows. Evan Evan 4, 9 9 gold badges 37 37 silver badges 58 58 bronze badges.

Let me give you some friendly advice, Evan. Don't do cargo cult programming! Dissect the code you found online. You can see clearly that it passes Application. MainWindow, and from that you can reason that by passing it a reference to a different window, you'll get your answer.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Things like this are easily answered by google C GetWindowRect ; you should also know about pinvoke. Of course that code will not work. It has to be this way: GetWindowRect handle, ref rect.

So, edit your GetWindowRect declaration. Width is not equivalent to right and Height is not equivalent to bottom. Width is right-left and Height is bottom-top. Of course, RECT don't have these sort of properties. It's just a bare struct. Creating RECT is an overkill. Rectangle is enough in. You just have to pass it in the appropriate way. Learn more. Asked 9 years, 4 months ago. Active 1 year, 9 months ago.

Viewed 26k times. I am trying to get the height and the width of the current active window. Width, bonds. Stephen Kennedy Active Oldest Votes. GetWindowRect new HandleRef this, this. Show rct. ToString ; myRect. Left; myRect. Top; myRect. Right - rct. Bottom - rct. Rectangle layout is the same. Jun 20 '11 at It really stores width and height, not right and bottom.

Different wording and different values. Abet Abet 37 3 3 bronze badges.

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I want to comment to the OP's post directly but since I can't, I'll just do it here. CharSet and ExactSpelling are not necessary. There's only one declaration of GetForegroundWindow in user There's no ANSI and unicode versions. Sign up or log in Sign up using Google.Sharethrough is a software company that powers in-feed native ads for premium publishers and enables marketers to programmatically distribute branded content at scale.

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wpf get window handle

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WPF and Win32 Interoperation

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wpf get window handle

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