public WinUICompositedWindow CreateWindow(IntPtr hWnd)
{
using var sc = _syncContext.EnsureLocked();
using var desktopTarget = _compositorDesktopInterop.CreateDesktopWindowTarget(hWnd, 0);
using var target = desktopTarget.QueryInterface <ICompositionTarget>();
using var drawingSurface = _device.CreateDrawingSurface(new UnmanagedMethods.SIZE(), DirectXPixelFormat.B8G8R8A8UIntNormalized,
DirectXAlphaMode.Premultiplied);
using var surface = drawingSurface.QueryInterface <ICompositionSurface>();
using var surfaceInterop = drawingSurface.QueryInterface <ICompositionDrawingSurfaceInterop>();
using var surfaceBrush = _compositor.CreateSurfaceBrushWithSurface(surface);
using var brush = surfaceBrush.QueryInterface <ICompositionBrush>();
using var spriteVisual = _compositor.CreateSpriteVisual();
spriteVisual.SetBrush(brush);
using var visual = spriteVisual.QueryInterface <IVisual>();
using var visual2 = spriteVisual.QueryInterface <IVisual2>();
using var container = _compositor.CreateContainerVisual();
using var containerVisual = container.QueryInterface <IVisual>();
using var containerVisual2 = container.QueryInterface <IVisual2>();
containerVisual2.SetRelativeSizeAdjustment(new Vector2(1, 1));
using var containerChildren = container.Children;
target.SetRoot(containerVisual);
using var blur = CreateBlurVisual();
containerChildren.InsertAtTop(blur);
containerChildren.InsertAtTop(visual);
return(new WinUICompositedWindow(_syncContext, _compositor, _pumpLock, target, surfaceInterop, visual, blur));
}
// Create window and content
protected override HandleRef BuildWindowCore(HandleRef hwndParent)
{
// Create Window.
HwndHost = User32.CreateWindowExW(
dwExStyle: 0,
lpClassName: "Message",
lpWindowName: "CompositionHost",
dwStyle: User32.WS.WS_CHILD,
x: 0, y: 0,
nWidth: 0, nHeight: 0,
hWndParent: hwndParent.Handle,
hMenu: IntPtr.Zero,
hInstance: IntPtr.Zero,
lpParam: IntPtr.Zero);
// Get compositor and target for hwnd.
_compositorDesktopInterop.CreateDesktopWindowTarget(HwndHost, true, out _compositionTarget);
return(new HandleRef(this, HwndHost));
}