grottel

Everything in the UI is drawn by defining the upper left X,Y coordinate and its size to the right and down (CX, CY)

So how to make it look different?
By adding additional screen graphics that blend or concel the editbox (text entry) area.

Your editbox will still be a rectangular shaped object.

For instance, draw a circle - then draw the largest square possible inside the circle. With proper blending the and backbround the edittext area will blend seamlessly and appear as text inside a ball - although the text will still be bounded to the shape of a square.

The overlay is bit trickier. Make a rectangle - and then put some graphic over it an area. The problem here is that the the text area is still be drawn. So while you can cover it up, you can't make a certain area just disappear.