WebJul 17, 2014 · 1 Answer. Assuming the COM interface method receives a std::size_t (or equivalent) and a BSTR*, you probably should use std::vector::data () instead of dereferencing an iterator: re "you probably should use std::vector::data ()", it has the disadvantage that it's C++11, and I fail to see any advantage. what is the basis for this … WebJan 1, 2011 · The BSTR functions are actually really simple and easy to use from C or C++. I think that VC++ even provides a wrapper class to automatically free the BSTR as it goes out of scope, but it doesn't add much functionality and not knowing exactly how it works bothered me, so I just always called SysAllocString and SysFreeString directly. –
[MS-DTYP]: BSTR Microsoft Learn
WebJan 12, 2015 · @TonyK: A BSTR is just a pointer, there is no destructor to call if the operator returns a BSTR directly. You would have to make the operator return an … Web配套讲稿： 如PPT文件的首页显示word图标，表示该PPT已包含配套word讲稿。双击word图标可打开word文档。 特殊限制： 部分文档作品中含有的国旗、国徽等图片，仅作为作品整体效果示例展示，禁止商用。 specsavers tulse hill
A COM Smart Pointer - CodeProject
WebOct 24, 2014 · But IXMLDOMDocumentPtr is not a COM object - it's a smart pointer class (based on _com_ptr_t template) wrapping a raw COM interface pointer. When you call a method on this class, it calls a method on the acttual COM interface, then inspects the returned HRESULT and, if it indicates failure, throws _com_error WebNative C++ with helper smart pointers The above approach has the least amount of external dependencies but the code is too verbose. Every method and invocation returns an HRESULTwhich needs to be validated after each call. Also, the returned interfaces are reference-counted and must be explicitly released by calling their … WebActually, the parentheses are unnecessary: ++*p++ will successfully increment both value and pointer (postfix ++ binds stronger than dereference *, and that happens before the prefix ++ due to order). The parentheses are only necessary when you need the value before incrementing it (*p++)++. specsavers try contact lenses