I tried this last month when I first started using DX4WIN, and couldn't get it to work.
I just tried it again, and it won't give me the information for the call. Perhaps I'm not hitting the right keys. From the log entry window, I hit F3. This brings up a window, "Callsign/Mgr lookup". What do I do after that to get callsign info? If I hit ENTER, I get the QSL information for the call OK. 73, Dennis -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.12/265 - Release Date: 2/20/2006

