You can use a Worksheet Change event on the cell to run code to send an
email. Here is info on events and sending mail

http://www.cpearson.com/excel/Events.aspx
http://www.j-walk.com/ss/excel/tips/tip86.htm

As I recall, the email part can be a bit tricky. I've not done much of it
so can't give an example.

Private Declare Function ShellExecute Lib "shell32.dll" _
Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, _
ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As
String, _
ByVal nShowCmd As Long) As Long

Sub SendEmail()

'Example for Outlook Express
'In Excel 2002 I can use around 600-700 characters
Dim msg As String, cell As Range
Dim Recipient As String, Subj As String, HLink As String
Dim Recipientcc As String, Recipientbcc As String

Recipient = "

'Defining subject of email
Subj = "Your subject"


msg = "Your message"

HLink = "mailto:" & Recipient
HLink = HLink & "?subject=" & Subj
HLink = HLink & "&body=" & msg

ActiveWorkbook.FollowHyperlink (HLink)
Application.Wait (Now + TimeValue("0:00:03"))
Application.SendKeys "%s"

End Sub


I'm not exactly sure what the first 4 lines do, so you probably ought to
figure that out before you use this regularly. In addition, I *think* you
may need to have Outlook open to run this.
--
HTH,
Barb Reinhardt



"Ash D" wrote:

Is there a way to trigger an email if a cell in a worksheet becomes e.g.
negative?