In Excel 2000 and earlier versions, you can change the selection in a
data validation dropdown, if the list is from a range on the worksheet.

If the list is typed in the data validation dialog box, the selection
can't be changed.

In Excel 2002 and later versions, neither type of dropdown list can be
changed if the cell is locked and the sheet is protected.

This MSKB article has information on the previous behaviour:

XL97: Error When Using Validation Drop-Down List Box
http://support.microsoft.com/default.aspx?id=157484


kfutbol wrote:
It is a validation and uses a list on the same sheet
(Data-Validation-Lists-Select Cells). I highlighted the list and selected
Format-Cells-Protection Tab-Lock and then I protected the sheet, but I can
still change the drop down list. What am I doing wrong?? Thanks.

"Springbok" wrote:


Hi,

Is the drop down list part of validation / combo box? If it is is it linked
to a list in an array in the same workbook? You can protect it by locking
the cells that make up the list array. Then apply worksheet protection.

Cheers,
Jon

"kfutbol" wrote:


When protecting a sheet, I know you can prevent changes to cell content but
how can you prevent a change in a drop down list? Once I protect the sheet,
I can still change a drop down list. How can I prevent this? Thank you!



--
Debra Dalgleish
Excel FAQ, Tips & Book List
http://www.contextures.com/tiptech.html