Hi Emerson,

>2) I've tried with a form.
>But I need some effects (like a transparency, for example) in the form that forces me to create a top level form, which causes the application to lose the focus and I can give the same appearance of the Office 2007 tooltips.

Can't you keep the form visible, but outside the visible area and to display it just move the tooltip window? Eventually, EnableWindow() allows you to prevent that the window is activated at all.