将C++字符串/WCHARGET**转换为C?

如果您使用ATL,可以这样做:

std::string theString = "hello";
CComBSTR bstr(theString.c_str());
DoSomething(bstr);  // Function that takes a BSTR as an argument

或者如果没有ATL:

const wchar_t* theString = L"hello";
BSTR bstr = SysAllocString(theString);
DoSomething(bstr);
SysFreeString(bstr);