Best practices for Alt-Tab support in a DirectX app?

Question

When writing DirectX applications, obviously it\'s desirable to support the user suspending the application via Alt-Tab in a way that\'s fast and e

Answer 1

We solved it by not using a fullscreen DirectX device at all - instead we used a full-screen window with the top-most flag to make it hide the task bar. If you Alt-Tab out of that, you can remove the flag and minimize the window. The texture resources are kept alive by the window.

However, this approach doesn't handle the device lost event happening due to 'lock screen', Ctrl+Alt+Delete, remote desktop connections, user switching or similar. But those don't need to be handled extremely fast or efficiently (at least that was the case in our application)