I’ve seen this question come up a couple times recently. And while it would be nice to do you cant.
The frame type is required to be set when the window is constructed. And there’s no constructor on a window that allows you to do something like
dim w as new Window(frametype)
So how can you have something like a document window on macOS and a movable modal on Windows ?
With a little inventiveness and some work.
First – make a container control that will be the windows content. All your common ui elements go in here. This is the common UI.
Then create a new window for macOS and set its frame type to whatever you need on macOS.
And one for Windows and Linux if needed.
One each embed, at design time, an instance of the container control you just created. Any non-common ui can be added directly to the windows themselves.
Now at runtime when you need an instance of this window you can use conditional compilation to make sure you get the right kind of window.