VBA中函数的参数范围

Question

是否存在获取函数的给定参数的范围或至少将函数的参数作为Object获取的常用方法，例如：

Function func(x1 As VarType_1, ..., xn As VarType_n)
    .......
End Function


Sub sub_1()
    '1)
    Dim x1_domain
    x1_domain = func.x1.VarTypeDomain
    'or at least:
    '2)
    Dim arg1 As Object
    Set arg1 = func.x1
End Sub