What do you mean by Upload Control? You mean the input type="file" element? If so there's very little you can do to style it.
In general modern uploads are done with Upload plug-ins of some sort. What I do in most of my apps is capture the regular input as part of regular form submission and then trigger the upload control to upload files at the same time. Because these controls chunk files as they are uploded (so they can provide progress information) they're not part of the regular POST data flow of an HTML form but are uploaded separately.
There are a variety of upload components out there most of them free. I'd look into that first...
+++ Rick ---
>Anyone know if we have more control over the upload control in HTML5?
>
>One item that keep being asked me is if it is possible to increase the textbox width as well as controlling the language of the Browse button.