Private Sub DivideOnErrRtnZeroVerify()
    ' Test the DivideOnErrRtnZero function.

    Debug.Assert DivideOnErrRtnZero(1.3, 2) = 0.65
    Debug.Assert DivideOnErrRtnZero(1, 2) = 0.5
    Debug.Assert DivideOnErrRtnZero(0, 2) = 0
    Debug.Assert DivideOnErrRtnZero(-0.3, 2) = -0.15

    Debug.Assert DivideOnErrRtnZero(1.3, 0) = 0
    Debug.Assert DivideOnErrRtnZero(1, 0) = 0
    Debug.Assert DivideOnErrRtnZero(0, 0) = 0
    Debug.Assert DivideOnErrRtnZero(-0.3, 0) = 0

    Debug.Assert DivideOnErrRtnZero(1.3, -2) = -0.65
    Debug.Assert DivideOnErrRtnZero(1, -2) = -0.5
    Debug.Assert DivideOnErrRtnZero(0, -2) = 0
    Debug.Assert DivideOnErrRtnZero(-0.3, -2) = 0.15

    ' Causes error inside function.
    Debug.Assert DivideOnErrRtnZero("Joe", 1) = 0
    Debug.Assert DivideOnErrRtnZero(1, "Joe") = 0

    ' Division supports Nulls.
    Debug.Assert IsNull(DivideOnErrRtnZero(Null, 1))
    Debug.Assert IsNull(DivideOnErrRtnZero(1, Null))

End Sub