private void EnableBlur()
{
var windowHelper = new WindowInteropHelper(this);
var accent = new User32.AccentPolicy
{
AccentState = User32.AccentState.ACCENT_ENABLE_BLURBEHIND
};
var accentStructSize = Marshal.SizeOf(accent);
var accentPtr = Marshal.AllocHGlobal(accentStructSize);
Marshal.StructureToPtr(accent, accentPtr, false);
var data = new User32.WindowCompositionAttributeData
{
Attribute = User32.WindowCompositionAttribute.WCA_ACCENT_POLICY,
SizeOfData = accentStructSize,
Data = accentPtr
};
User32.SetWindowCompositionAttribute(windowHelper.Handle, ref data);
Marshal.FreeHGlobal(accentPtr);
}
public static void ApplyBlur(Window window)
{
var accent = new User32.AccentPolicy {
AccentState = User32.AccentState.EnableBlurBehind,
AccentFlags = 2
};
var accentPtr = IntPtr.Zero;
var accentSize = Marshal.SizeOf(accent);
try {
accentPtr = Marshal.AllocHGlobal(accentSize);
Marshal.StructureToPtr(accent, accentPtr, false);
var wcaData = new User32.WindowCompositionAttributeData {
Attribute = User32.WindowCompositionAttribute.AccentPolicy,
SizeOfData = accentSize,
Data = accentPtr,
};
User32.SetWindowCompositionAttribute(new WindowInteropHelper(window).Handle, ref wcaData);
}
finally {
if (accentPtr != IntPtr.Zero)
{
Marshal.FreeHGlobal(accentPtr);
}
}
}
