如何使用VARIANT * pvarItems构建对象

Question

如何编写单元测试来调用以下函数计算？或者说如何用数字2和0.8构建参数VARIANT * pvarItems？ 请注意这个参数是一个指针！ 感谢。

STDMETHODIMP MyCom::Calculate(VARIANT* pvarItems)
{
HRESULT hr = S_OK;

if (V_VT(pvarItems) == (VT_ARRAY | VT_VARIANT))
{
    SAFEARRAY *psa = V_ARRAY(pvarItems);

    LONG lb, ub;
    hr = SafeArrayGetLBound(psa, 1, &lb);
    hr = SafeArrayGetUBound(psa, 1, &ub);

    for (LONG i = lb; i <= ub; i++)
    {
        VARIANT out;
        VariantInit(&out);

        hr = SafeArrayGetElement(psa, &i, &out);

        switch (V_VT(&out))
        {
        case VT_I4:
            printf("Item number %d, Value is %d\n", i, V_I4(&out));
            break;
        case VT_BSTR:
            printf("Item number %d, Value is %ls\n", i, V_BSTR(&out));
            break;
        default:
            printf("Item number %d, Sample not coded for this data type\n", i);
        }

        VariantClear(&out);
    }
} 
return S_OK;
}