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Tip of the Day
Language: VB4,VB5,VB6
Expertise: beginner
Jul 24, 1999



Application Security Testing: An Integral Part of DevOps

NZ - Check whether a value is Null

' Check if a value is Null. If not it returns the value, 
' otherwise it returns the ValIfNull argument, or zero/null string
' if the second argument is omitted
' This function is patterned after the Access function with the same name.

'Date:          19 Feb 99
'Developer:     Heather McCaslin

Public Function NZ(CheckVar As Variant, Optional ValIfNull As Variant) As _

    If IsNull(CheckVar) Then
        If IsMissing(ValIfNull) Then
            ' this translates to "" for strings, and 0 for numbers
            NZ = Empty
            NZ = ValIfNull
        End If
        NZ = CheckVar
    End If
End Function
Heather McCaslin
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