Use a worksheet event macro. This macro will lock A1 once data has been
entered:

Private Sub Worksheet_Change(ByVal Target As Range)
Set ra1 = Range("A1")
If Intersect(Target, ra1) Is Nothing Then Exit Sub
ra1.Locked = True
ActiveSheet.Protect
End Sub

This assumes that we start with all cells unlocked and the worksheet
un-protected.


Because it is worksheet code, it is very easy to install and use:

1. right-click the tab name near the bottom of the window
2. select View Code - this brings up a VBE window
3. paste the stuff in and close the VBE window

If you save the workbook, the macro will be saved with it.

To remove the macro:

1. bring up the VBE windows as above
2. clear the code out
3. close the VBE window

To learn more about macros in general, see:

http://www.mvps.org/dmcritchie/excel/getstarted.htm

To learn more about Event Macros (worksheet code), see:

http://www.mvps.org/dmcritchie/excel/event.htm


--
Gary''s Student - gsnu200789


"gpros32" wrote:

I need other employees to be able to enter data such as a timestamp into a
spreadsheet. But once they enter it I want the cell to lock automatically so
they can not adjust the times later. Is there any way for the cell to lock
once data has been put in??