Is it possible to get the Hwnd of a WPF Popup control?

Question

I need to apply an Aero background blur to only part of a custom-shaped WPF window. The problem is that to apply the blur with DWM, I need to provide a window handle to the DwmEnableBlurBehindWindow function.

I have been told that the WPF popup control is actually a separate window. That is good. Can I get a popup's handle to apply blur to it? If so, how?

Answer 1

Try this

HwndSource source = (HwndSource)HwndSource.FromVisual(myPopup)

or this but this one only works for actual Windows, but might help for future references.

IntPtr handle = new WindowInteropHelper(myWindow).Handle;

Answer 2

Try this:

<Popup Name="MyPop" IsOpen="True" Height="50" Width="50">
    <!--or other control-->
    <Rectangle/> 
</Popup>


// only after MyPop.IsOpen is true
IntPtr handle =  ((HwndSource)PresentationSource.FromVisual(MyPop.Child)).Handle;