Try using Google - it gives 94,000 entries for "LNK1120 error"
such as -
http://www.kbalertz.com/kb_909350.aspx
and -
http://support.microsoft.com/default...b;en-us;815650
Also find Microsoft Knowledge Base (use Google again) and get familiar with it if you are using Microsoft products.
If you get yourself familiar with search techniques you can save yourself a lot of time.
Alan