Forum:How to make a rounded wiki header and search box?

Okay, so I just want my wiki to spruce up a little. I want to make the rounded header, like this one:. And the search box, I want it to be rounded also, and to change the the text inside of it, like this: I need codes for these features. I'm not good in English, so I put some images. Sorry for that.The Fan  of Wiki  05:26, September 11, 2012 (UTC)