Let say in 'A1' I input as "KELVIN", then this word will not allow anymore in
anywhere in the same sheet.
How to do it?
What's the coding in VBA of it?

Kelvin,

You've asked for VBA, but here's a way without it:

1) Select all the cells of the worksheet except A1. To do this, click A2,
then press Ctrl-Shift-DownArrow. Add column B to the selection by
Ctrl-clicking the column B header, then press Ctrl-Shift-RightArrow. All the
cells except A1 should not be selected, and B1 is the active (white) cell of
the selection.

2) Data - Validation. Set the Allow box to Custom. Enter the following
formula:
=B1<$A$1
Click OK.
--
Earl Kiosterud
www.smokeylake.com

"Kelvin Lee" wrote in message
...
Let say in 'A1' I input as "KELVIN", then this word will not allow anymore
in
anywhere in the same sheet.
How to do it?
What's the coding in VBA of it?

Thanks, Earl Kiosterud~ I got the partial of what I want already~
But the way you teach me, it still allow 'A2' to input as "KELVIN"...
And, I'll not only need a specify cell like 'A1' but anywhere as long as I
input "KELVIN" in anywhere cell. Then I can't input it again in any other
cell...
(Sorry, my English not very well. Hope you understand what I want :P)

"Earl Kiosterud" wrote:

Kelvin,

You've asked for VBA, but here's a way without it:

1) Select all the cells of the worksheet except A1. To do this, click A2,
then press Ctrl-Shift-DownArrow. Add column B to the selection by
Ctrl-clicking the column B header, then press Ctrl-Shift-RightArrow. All the
cells except A1 should not be selected, and B1 is the active (white) cell of
the selection.

2) Data - Validation. Set the Allow box to Custom. Enter the following
formula:
=B1<$A$1
Click OK.
--
Earl Kiosterud
www.smokeylake.com

"Kelvin Lee" wrote in message
...
Let say in 'A1' I input as "KELVIN", then this word will not allow anymore
in
anywhere in the same sheet.
How to do it?
What's the coding in VBA of it?