下载图片|文件
<pre><code> //函数名称 DownloadPic
//功能：主动下载收到的图片 文件, 会保存到企微 图片 文件 目录 16888502467371223\Cache\Image\2021-11
//dwPid: 企微的pid
//v1_hex: 下载cdn，收消息监控到的 图片的v1 或者 hex
//string v1_hex = &quot;30818b02010204818330818002010002043ac574c602030f55cb0204ae8e1e6f02046162f24304444e45574944315f3361633537346336616538653165366636313636363938655f38323935646161652d373665332d343834392d613931632d3838663364313862333333320201000203075b60041098a557614b41bef2fabb3831418f40420201020201000400&quot;;
// string v1_hex = &quot;https://imunion.weixin.qq.com/cgi-bin/mmae-bin/tpdownloadmedia?param=v1_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&quot;;
int DownloadPic(int dwPid, const char* v1_hex);</code></pre>