How to use IsObject function in VBA?

The IsObject function in VBA (Visual Basic for Applications) is used to determine if a variable is an object type. The purpose of the IsObject function is to avoid run-time errors that might occur if you try to perform an object-specific operation on a non-object.

Example

VBA


Sub CheckIfObject()
    Dim potentiallyAnObject As Variant
    Dim regularVariable As Integer
    
    ' Assign a new Collection (which is an object) to the variant
    Set potentiallyAnObject = New Collection
    
    ' Check if potentiallyAnObject is an Object
    If IsObject(potentiallyAnObject) Then
        MsgBox "potentiallyAnObject is an object"
    Else
        MsgBox "potentiallyAnObject is not an object"
    End If
    
    ' regularVariable is not an object, it's an integer
    regularVariable = 10
    If Not IsObject(regularVariable) Then
        MsgBox "regularVariable is not an object"
    End If
End Sub

We declare two variables, potentiallyAnObject as Variant which can hold both object and non-object types and regularVariable as Integer which can hold numbers.
We create a New Collection (a collection is a type of object in VBA) and assign it to the potentiallyAnObject variable.
We then use IsObject to check if potentiallyAnObject is indeed an object. Since we have assigned a Collection object to it, the message box will confirm that it is an object.
For the regularVariable, which is not an object, IsObject will return False.

Remember that IsObject only checks if the variable is an object; it does not verify the type of the object. If you need to ensure that an object is of a specific type, you would need to use TypeName or TypeOf.

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