A while back I made a post on Hidden attributes to control your work item form layout . Later I realized from a forum post that there are few control specific attributes that are not documentated, so I updated the post with NumberFormat & MaxLength attributes for FieldControl and Format & CustomFormat attributes for DateTimeControl. I did another search in code and looks like I haven't missed any other attributes. The format attributes are good to know for DateTimeControl because I occasionally hear the question: DateTimeControl seems to show only Date, no "time" part - now we know how to set it up to show time part.
