Is there a MessageBox alternative which can be centered not in the desktop but in a top-level form?

I have a few small applications which are top-level forms (SHOWWINDOW = 2) where the top-level forms are quite small. MessageBox centers the box in the desktop, so what happens is that the messagebox can appear on the desktop far away from the application that created it. (Odd effect indeed if other apps are visible as well, as it appears on top of them ...)

I suppose it would be nice as well, as long as I'm looking for an alternative, to hope that it allowed me to specify button captions, font sizes, and other good stuff, but those would just be bonuses.

Thanks in advance