[DXBase] Discovering New Grids

[Ed Parish K1EP]

I entered my log from this weekend's VHF contest in to DxBase.  After 
initialized totals, I discovered I worked some new grids.  How can I use the 
Selection Wizard or some other method to determine which grids are new?  I 
would define a "new grid" in this sense to be one that I have not received a 
QSL or have one sent but not received.