1.1 - New Window - How to set content (or still not possible?)

[TRadigk]

Hi guys,

I am waiting for months to have the ability to create, open and show a new window in my WindowsApp, based on WinUi3.

Today I found the preview release of WinUi 1.1 preview 1. And I got exited, because I assume I can now work with multiple windows easily. Becasue there are more and more things that let me think it should be possible and easy to do.
Manage App Windows: Available (link=https://docs.microsoft.com/en-us/windows/apps/windows-app-sdk/release-channels#features-available-by-release-channel)
Multiple Windows on same thread ([link=We have stabilized and enabled the creation of multiple windows on the same thread in WinUI 3 applications. See issue 5918 for more information.](url))
And several more, since something like this is mentioned for 1.0.1 stable release.

On the other hand I still find this:
The Windows App SDK doesn't currently provide methods for attaching UI framework content to an AppWindow. You're limited to using the HWND interop access methods demonstrated in the Code example section.
found here: https://docs.microsoft.com/en-us/windows/apps/windows-app-sdk/preview-channel

When I search the internet I find articles for "how to" in UWP, but none of those mentioned methods are implemented.
I can create a new window, but I do not find any evidence, guide or whatever that tells me how to attach content to it. Even the links provided "see how to handle HWND interop" do not contain any hint on how to attach the content to the window.

Am I blind? Stupid?
At this point I am very frustrated and appreciate any help.

[TRadigk]

And I am stupid. The window can be instantiated and simply by calling "Activate()" on it, it is shown.
Nevertheless, the API for a Xaml window Window class and AppWindow class are different. An AppWindow allows to call Resize(), while the size of Xaml window is not so easy to change.

For an easily resizeable window class I strongly recommend this package: https://github.com/dotMorten/WinUIEx - with this I get everything I need (for the moment).