Contrived C#/WPF example implementing "Aero Glass" blur on Windows 10

gistfile1.cs

internal void EnableBlur()
{
	var windowHelper = new WindowInteropHelper(this);
	
	var accent = new AccentPolicy();
	var accentStructSize = Marshal.SizeOf(accent);
	accent.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND;
	
	var accentPtr = Marshal.AllocHGlobal(accentStructSize);
	Marshal.StructureToPtr(accent, accentPtr, false);
	
	var data = new WindowCompositionAttributeData();
	data.Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY;
	data.SizeOfData = accentStructSize;
	data.Data = accentPtr;

	SetWindowCompositionAttribute(windowHelper.Handle, ref data);
	
	Marshal.FreeHGlobal(accentPtr);
}