CODEWITHSUNDEEP
c#wpf
Drahcir
Drahcir

Reputation: 11972

How to get the hWnd of Window instance?

My WPF application has more than one window, I need to be able to get the hWnd of each Window instance so that I can use them in Win32 API calls.

Example of what I would like to do:

Window myCurrentWindow = Window.GetWindow(this);
IntPtr myhWnd = myCurrentWindow.hWnd; // Except this property doesn't exist.

What's the best way to do this?

Upvotes: 63

Views: 69296

Answers (2)

Drew Noakes
Drew Noakes

Reputation: 311255

Extending on Douglas's answer, if the Window has not been shown yet, it might not have an HWND. You can force one to be created before the window is shown using EnsureHandle():

var window = Window.GetWindow(element);

IntPtr hWnd = new WindowInteropHelper(window).EnsureHandle();

Note that Window.GeWindow can return null, so you should really test that too.

Upvotes: 24

Douglas
Douglas

Reputation: 54897

WindowInteropHelper is your friend. It has a constructor that accepts a Window parameter, and a Handle property that returns its window handle.

Window window = Window.GetWindow(this);
var wih = new WindowInteropHelper(window);
IntPtr hWnd = wih.Handle;

Upvotes: 93

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