I hate to be a bit blunt but you're really barking up the wrong tree. VSCode debugger works fine on both msvc and mingw targets. Asking for COM or UWP is like

I hate to be a bit blunt but you're really barking up the wrong tree. VSCode debugger works fine on both msvc and mingw targets. Asking for COM or UWP is like saying that Javascript has a horrible interop story with COM/UWP. You're picking Rust to build something fast and/or low memory. Leave building a UI to the right tools. C# has a fantastic FFI and works just fine with Rust. I actually have a project using UWP and Rust together. I get all the portability of Rust and get to use UWP as the UI frontend with minimal fuss.