Question

I have a function in VBA that usually returns an array. If there is nothing to return it returns an empty variable (b = empty).
I have some code to loop though the array but I get an error if the variable is not an array. How can I make an if statement that doesn’t cause its own error. I have tried

if not b = empty then
'do the loop
end if

but this gives an error when b is an array
Similarly I get error for b = null, b = nothing, b(1,1) = "" etc.

What is the best way to check this?

Answer 1

To test if a variable is empty, use the IsEmpty function.

If IsEmpty(b) Then
    Debug.Print "b is Empty"
End If

To test if a variable is an array, use the VarType function.

If VarType(b) And vbArray Then
    Debug.Print "b is an array"
End If