设置ssl上下文结构之后，就可以创建连接了。
With the SSL context structure set up, the connection can be created.
在创建上下文结构之后，必须加载一个可信任证书库。
After the context structure is created, a trust certificate store must be loaded.
把获取的句柄复制到端点查询上下文结构的适当字段中。
The handle thus obtained is copied into the appropriate field of endpoint inquiry context structure.
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