Designing Kitchens and Bathrooms - bathroom window, tile or no tile?

The bathroom has a small window set quite high and does not get water from the shower on it. It did have tile all around it.
If we choose to just tile the bottom ledge how do we finish the sides and top so that it could be painted? If we put durock inside the niche, that could not be painted. Could we use green board there and would we need to put metal edging there also before mudding the edges? Not sure if I am using the correct teminology, but I am sure someone will know what the heck I am trying to say!!!!!!!!!!
Thanks.

Close enough to get the point. If you use drywall, yes, you'll need corner bead and mud. You could also trim it out in wood with a frame and paint that. I personally prefer tile on the sill because water tends to sit there and cause problems with wood or dry wall, but it gets there by running off the rest so those areas dry better and that's what it sounds like you're planning to do.

Thanks for the quick reply. This forum is so great especially when you need an answer NOW, when you are in the middle of a job.
If we choose to frame it in wood, would we put the tiles on the wall first and then bring the wood upto the edge of the tiles? I suppose really we should use edging tiles around the opening, but the edging tiles that they make for this particular tile do not really match, so my daughter does not want to use them in places that you see. Hence my question about bringing the wood to the edge of the wall tile.
thanks

Not being a carpenter, I'm not sure how it should be, but in my own house, I think that's how I'd do it. When doing showers, it's best to do the floor first and then the walls so they sit on the floor and allow water to drain away rather than go down the joint at the bottom. I would think the idea would be the same here, but, if not, someone will chime in and make the needed correction.

Instead of using wood, why not use bullnose tile inside the frame. You could tile up to the window on the walls and use the bullnose on the inside edges of the window. If the bullnose tile (what you are calling edge tiles) is not a perfect match you wont notice it.

I certainly would prefer to do the bull nose but my fussy daughter would not!!!!!!!!!!! Maybe I can talk her into it.