Navigating the Edit Expression dialog w/ keyboard?

[#1]

Is there a good way to navigate the Edit Expression dialog without using the mouse? I'd love to be able to just hit ctrl+enter or some such when I was done typing some expression to close the dialog. As it stands, I can't figure out how to get out of there without using the mouse to click OK or Cancel...

Thanks!

[#2]

A bump, just in case something has changed in recent versions.

[swuehl]

To cancel the edit expression dialog, hitting escape key 'esc' should do.

No idea how you can invoke an 'OK' using keyboard.

All the shortcuts I know are listed in appendix B of the ref manual.