A family of Microsoft relational database management systems designed for ease of use.
At some point you evidently used the Common Controls addin. You can find out where it's referenced by opening the VBA editor (ctrl-G will do it) and viewing the References (Tools... References). The COMCTL32.OCX entry should be there marked MISSING.
Uncheck that line and compile the database. You should get an error on the line (or lines) of code calling something from that library. If you don't get any errors just leave that reference unchecked; if you do, then you'll need to decide whether to install that feature (if it's even compatible with A2010, I don't know!) or can program around it.