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VBA Visual Basic for Applications (Microsoft) FAQ

Office / VBA General

IsNothing Function since I always forget it is not part of VBA IsSomething functions by SBendBuckeye
Posted: 5 Jul 03

VBA provides a long list of IsSomething functions for use in testing various properties or settings in your code. I
periodically forget that I have to test for VariableName Is Nothing since VBA does not provide an IsNothing function for my use. This usually happens at the end of a long day and can be quite frustrating so I wrote my own as below:

'* Function: Returns true if argument evaluates to nothing
'* 1. IsNothing(Nothing) -> True
'* 2. IsNothing(NonObjectVariableOrLiteral) -> False
'* 3. IsNothing(ObjectVariable) -> True if instantiated,
'*                                 otherwise False
Public Function IsNothing(pvarToTest As Variant) As Boolean
    On Error Resume Next
    IsNothing = (pvarToTest Is Nothing)
    On Error GoTo 0
End Function 'IsNothing


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