Windows 7: What do these mean (in authuii.dll)

What do these pictures mean, they are in authui.dll? Where are they used? John

These are resources of Windows 7 Logon screen.

12212 is that little thing in the middle of scroll bar slider (on mouseover)
12216 is shutdown icon with updates
11003 is a frame for password text area

This Japanese website has pictures of these elements highlighted in the interface.

thank you very much