Excel Golf Skins Sheet

I need a micro that will highlight the cell with the lowest unique value in each individual column.

It would not highlight anything if there were multiple occurrences of the same lowest number.

I know how to do it in old basic, but not in excel visual basic.

Example: 2 3 4 4 4 3 5 - it would highlight the 2

Example: 3 5 7 4 3 4 4 5 5 - no highlight due to multiple 3s

Thanks in advance.