Hi,
You could use the user-defined worksheet function bellow.
One thing i have changed in your requirement is the page counting. You say
7-19 should return 12, but shouldn't it return 13? Eg: 3-4 would return 2 and
not 1.

'--------------------------------------------------------------
Public Function PInterval(S As String) As Double
Dim v, v1

v = Split(S, ",")
For Each v1 In v
PInterval = PInterval + CDbl(Evaluate("-(" & v1 & ")+1"))
Next
End Function
'-----------------------------------------------------------
--
Regards,
Sébastien
<http://www.ondemandanalysis.com


"Steve" wrote:

Hey, I'm having these (hopefully simple problems) with writing in page numbers:
(I also posted this in the newbie section, but maybe it fits better here?)

1. I want to write ex. 7-19 in a cell -
Then in another cell I want excel to give the result of the interval of,
here 12.

2. Now, if that's possible, I also want to ask this:
In one cell i want to write 2 or more different interval, ex
7-19, 81-90.

Can I make excel understand what I'm writing somehow? And get the result of
these intervals in another cell, here 21 (12+9)

Any help will be extremely appreciated - thanks in advance, steve.