How to return true false using VBScript

No problem!

Function Invert(x)
    Dim returnValue
    If x = False Then
        returnValue = True
    Else
        returnValue = False
    End If
    Invert = returnValue
End Function

Assigning to the name of the function will return the value that was assigned from said function.
Dee this tutorial on VbScript: VBScript Tutorial[^]

Regards,

Manfred