On Windows Phone 7, go to Settings, email & accounts, add an account, the Windows Live (or any other). Note at the bottom there is the gray panel with a rectangular [sign in] button. Click in the email address field, and the on screen keyboard pops up ABOVE the gray panel. Rotate the phone, and the gray panel does not rotate, although the page does. That gray panel is the Application Bar, is it not?
I only find docs for adding an icon-based round button (and menu items). How do we put a rectangular textual button on the Application Bar?