fix(windows): don't show dummy window on start

[lesleyrs]

This is needed to stop the destroyed window flashing on startup.

[ColleagueRiley]

Would passing 0 for the style flags to CreateWindowA when creating the dummy window also fix the issue?

[ColleagueRiley]

@lesleyrs This commit might fix the issue instead ba9a65f

[lesleyrs]

@lesleyrs This commit might fix the issue instead ba9a65f

That's slightly better than the original (doesn't briefly show other window, but shows a white flash still maybe due to window style differences). I tried recording your change but you can't see the white flash on the recording, here are the other 2 though:

original:

my change:

Not exactly sure why my change works because the other window doesn't get set to visible here but it works.

Also note there's a 1 pixel border around the window that gets fixed after resizing it, but that's a different issue.

[ColleagueRiley]

This is strange considering the window is never actually displayed. It's probably some weird winapi behavior.

[lesleyrs]

You can keep window_style in dummy as 0 and it will still work same as just my change. That way if this one ever needs to be undone it'll still work better than before at least.

And yeah windowing can break easily I know both godotengine and winit have different issues on windows too, sdl and glfw work fine however.

[ColleagueRiley]

@lesleyrs I'm unsure if setting it as 0 will create other issues, so I'll leave it how it is.