Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Conditionally Displaying a Message Box.
You may have a need to display a message box whenever specific information is placed in a specific cell by the user. Fortunately, using the Change event for a worksheet can help you to figure out when something has been placed in a cell.
For instance, let's say that you wanted to displays a message whenever the information in cell C3 is changed. The following, added to the code window for a specific worksheet, will do the trick:
Please Note:
This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: 
Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Address = "$C$3" Then
MsgBox "Changed It!"
End If
End Sub
The Change event is called, and passes the cell range to the routine. In this case, the range is assigned to the Target variable. The address of this range is then checked, and if it is equal to C3 (it has to be noted in absolute terms, such as $C$3), then the message box is displayed.
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (2553) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Conditionally Displaying a Message Box.
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2014-05-10 18:04:30
Michael (Micky) Avidan
The following command is a bit more Professional:
If Not Intersect(Target, [C3]) Is Nothing Then MsgBox "Changed It !"
(Check the Tip proposed command and try to copy/paste more than one cell over some range that includes cell C3.
Michael (Micky) Avidan
“Microsoft® Answers" - Wiki author & Forums Moderator
“Microsoft®” MVP – Excel (2009-2014)
ISRAEL
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