Dennis,

The font inside the MessageBox can be actually changed, though it requires some coding.

If the Timer object is created before the MessageBox, the dialog's window can be accessed from the method attached to the Timer event. Several API calls are applied to change the font.

The change may be not exactly smooth, for a fraction of time the original font is still visible.

Also if the new font is substantially larger, you have to add several CRLFs to the end of the message, artificially increasing the height of the dialog. Otherwise the message may be cut.

The message inside the message box can be altered to, although its length can not be increased.

FoxPro code sample (members area):
How to change font name and size in the MessageBox dialog
http://www.news2news.com/vfp/?example=434

So it's a clear choice, whether to use this technique or just develop a custom class.

Btw, check Steven Black's Message Services class.
http://www.stevenblack.com/SBCPublicDomain.asp