WinHttpOpenRequest第6个参数如何传？LPCWSTR*

WinHttpOpenRequest第6个参数MSDN的解释如下：

ppwszAcceptTypes [in]

Pointer to a null-terminated array of string pointers that specifies media types accepted by the client. If this parameter is set to WINHTTP_DEFAULT_ACCEPT_TYPES, no types are accepted by the client. Typically, servers handle a lack of accepted types as indication that the client accepts only documents of type "text/*"; that is, only text documents—no pictures or other binary files. For a list of valid media types, see ​​Media Types​​ defined by IANA at http://www.iana.org/assignments/media-types/.

参考地址：

​​https://msdn.microsoft.com/en-us/library/windows/desktop/aa384099(v=vs.85).aspx​​

---------------------------------------------------------------------------------------------------------------------------------------------------

网上的例子，第6个参数一般传：WINHTTP_DEFAULT_ACCEPT_TYPES，官方的例子也是一样。。。

--------------------------------------------------------------------------------------------------------

第6个参数的类型是LPCWSTR*，即WCHAR**，即是指向字符串的指针数组。

明白其是一个字符串指针数组，数组中的元素是WCHAR*，那么我们就可以这样传参数了：

LPCWSTR ppwszAcceptTypes[3];    // 创建一个WCHAR*指针数据
    WCHAR   szTmpW[3][32] = {0};    // 字符串数据
    wcscpy(szTmpW[0], L"接收类型1");
    wcscpy(szTmpW[1], L"接收类型2");
    ppwszAcceptTypes[0] = szTmpW[0];
    ppwszAcceptTypes[1] = szTmpW[1];
    ppwszAcceptTypes[2] = NULL;     // 最后一个指针元素必须是NULL，不然判断不了结束位置哈

    WinHttpOpenRequest((HINTERNET)222, L"WWW哦", L"呜呜呜", L"OK", L"RRR", ppwszAcceptTypes, 77);

---------------------------------------------------------------------------------------------------

参数传完了，如何解析呢？代码如下：

// 这个需要特别对待呀
    LPCWSTR *pAcceptType = ppwszAcceptTypes;
    int iIndex = 0;
    while(pAcceptType != NULL )
    {
        if (pAcceptType[iIndex] == NULL)
        {
            break;
        }
        WCHAR* pTmp = pAcceptType[iIndex]; 
        
    }