Are you asking how to get text into a graphic shape? If so, right-
click after drawing the shape and choose Add Text. The box inside the
shape will still be rectangular (even in a circle). If you're asking
about getting other text to wrap around a shape, that's done with the
Text Wrapping command (on the Picture toolbar or the Format Ribbon in
07) and it includes a Wrap Points option that you can use to build
your own "shape" for the flow.