1楼对的，这不是标准c++的。是MS搞的东西，感觉没什么人用的东西。

https://docs.microsoft.com/en-us/cpp/extensions/handle-to-object-operator-hat-cpp-component-extensions?view=vs-2019
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修改:z16166 FROM 125.33.227.*
FROM 125.33.227.*