I was just reporting a bug with /window -f. Since it's the only way to /drawsave an image with a specific size.

We don't care about Windows limitations, thoses ones can be fixed easily.

I mentionned the "own windows" just to remove Windows Border/Titlebar's limitation. (Khaled can do it if he want).
I know we can create own titlebar gui thanks to picwin, but you missunderstood I think.