Blurring the background of a semi-transparent form (like Aero glass)
问题 I have a borderless, non-resizable WPF form (WindowStyle=None, AllowsTransparency=True, ResizeMode=NoResize) with a semi-transparent background. Here's a picture of how the form, a semi-transparent red rectangle, looks right now, running on top of Notepad: However, I'd like the background to be blurred, like how Aero glass does it, except without all the fancy window borders and colored background with stripes - I'd like to handle that myself. Here's a mockup of how I want it to look like: