Silly Question - displaying a simple text + one button dialog box?

I recall there was a way to quickly call a method that would show a dialog that simply shows a line of text and a button, without going to all the trouble of adding a new Dialog control to the project and everything else. But, now I can't remember how to do that. How do you do this?

[323 byte] By [joynerCN] at [2008-1-7]