Positioning windows is hard.

I've got a borderless, no-resize window that contains a browser. I'm using it to create custom pop-out menus. I click on a button, and a dynamic list of values appears in the browser. The browser resizes to the contents, and I can click on the options to select a choice from the dropdown.

Unfortunately, there's no good way to dynamically detect where on the user's screen the button is, so I have to work it out for myself manually using a series of winget callbacks that traverse through the hierarchy in order to work out where to place the custom dropdown menu.

Being able to get the screen-pos of an element immediately would be a much better, cleaner solution.