This can be achieved through a macro, however, you would need to store the
password in the macro to unlock the sheet in order to make the changes -
assuming you have locked the sheet.

You would need to write the code in the VBA object for the sheet in
question, then using the macro:

Private Sub Worksheet_Change(ByVal Target As Range)

'find if condition is met for the cells in question then lock the cell
' assuming the cells in question are in B1:B5

Activesheet.Unprotect Password:="myPassword"

With ActiveSheet.Range("B1:B5")
For i = 1 to .Rows.Count
If .Cells(i, 1).Value 10 Then
.Locked = True
End If
Next I
End With

Activesheet.Protect Password:="myPassword"

End Sub



"Gyges" wrote:

In Excel, is there anyway to protect a cell only if it meets a certain
condition?