Q4 - the bottom edge of Emacs doesn't stick to the taskbar

[Tatsu Takamaro]

And the last question.

When I use this

*(add-to-list 'default-frame-alist '(height . 1.0))*

to tell Emacs be of all height, it takes it too literaly, and its bottom 
edge is shown hidden behind the taskbar line. What should I do to make 
it stick to the taskbar's up border?

Tony.