Error IsNumber function undefined

UHsoccer

Well-known Member
Joined
Apr 3, 2002
Messages
1,023
When using the following

If IsNumber(Range("B41")) = True Then

It returns a message "Sub or Function not defined

If it requires an "Install" of sorts, how can I insure that my customers have it also?
 

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just_jon

Legend
Joined
Sep 3, 2002
Messages
10,473
The VBA function is IsNumeric -- can use Application.WorksheetFunction.IsNumber as well.

There ARE differences between the two, however. I'll try to find a good write up on that.
 

Nimrod

MrExcel MVP
Joined
Apr 29, 2002
Messages
6,259
Public Sub Demo()
If IsNumeric(Range("B41")) And Not IsEmpty(Range("B41")) Then
MsgBox ("is number")
Else
MsgBox "Not number"
End If
End Sub

NOTE: Anything that returns a boolean value (eg True/False) does not require you to ask if it equals. For example in the above procedure since IsEmpty and IsNumeric both return a boolean value I have not had to say
IsNumeric(Range("B41")) = False .... instead just use IsNumeric(Range("B41"))
 

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