You’d have to get an outline of that text into Visio as an imported vector-graphic. Illustrator and Freehand have ways of converting text to outlines.

Also, you could create your text with WordArt in, say, Excel or Word. It’s usually under the 3D-looking “A” in one of the toolbars at the bottom of the window.

Create your WordArt object, then copy-paste to Visio. Ungroup it, and you’ll have your text outlines! You’ll probably have to delete some shapes, as you end up getting separate shapes for fills and outlines. When you’ve cleaned it all up, select all of your outlines and combine them, via: Shapes > Operations > Combine.

Unfortunately, I’ve found that the outlines get a bit sloppy when you do this, but it’s better than nothing, and it can be done quickly.

Have fun,

- Chris