How can I close Visual Studio's dockable windows with my keyboard?

Question

It's kind of annoying to have to use my mouse to close the windows that appear when when summoned by my keyboard e.g. I find usages of an object by hitting Shift+F12, or any of the other dockable windows that appear for various other reasons.

Ideally these would close when I hit escape, but this does nothing. Alt+F4 wants to close the entire visual studio.

Is there any keyboard shortcut to close these windows?

To be clear, this is the kind of window I'm referring to:

Answer 1

Just had a quick look, seems SHIFT-ESCAPE seems to be the shortcut you need.

The window itself must have focus.

Alternatively, CTRL-F4 will close the current tab.
Source.

Answer 2

It appears @inksmithy has answered the question, even though it doesn't work for me. I reckon it's because I'm using ReSharper and he isn't.

For what it's worth, I just discovered Ctrl + Shift + F4 works for me.

I've decided to mark @inksmithy's answer as correct but if that doesn't work for you try my one.

Answer 3

1. Set Focus to docked window (e.g. [Ctrl]+[g] for immediate window)
2. Press context menu key (at the right side of the space key)
3. Press the key to hide that window, indicated by _ in the contextmenu (depends on your language)