skyfree

摘要： VARIANT (VARIANTARG) is a special type that is a union of different types. VARIANTs can contain most primitive data types, strings, and arrays, but not fixed-length String data type and user-defined... 阅读全文

摘要： BSTR是COM中默认的字符串数据格式，和char* 及std::string等不同，BSTR is a null-terminated, length-prefixed, unicode string. 下面是一个非常好的对BSTR的解释： A bstr is a pointer to a string of wide char. The string is not terminated. In... 阅读全文