Hi Steve
for this you need VBA. Though before you try this, maybe two other
suggestions
1. Set the conditional format to 'WHITE'
2. Use autofilter to display all values except your specific value
If this does not help you, you have to process the Worksheet_change
event:
Private Sub Worksheet_Change(ByVal Target As Range)
Set SourceCell = Range("A1")
ConditionValue = "your string expression"
If SourceCell = ConditionValue Then
Range("B1").EntireColumn.Hidden = True
Else
Range("B1").EntireColumn.Hidden = False
End If
End Sub
Frank