您所在位置：主题：_variant_t构造函数问题
linfengfeiye
[专家分：320] 发布于 2009-08-21 16:13:00
_variant_t( IUnknown* pIUknownSrc, bool fAddRef = true )
这个构造函数是什么功能？
msdn英文如下，从一个COM接口指针构造一个VT_UNKNOWN类型的_variant_t对象，如果 fAddRef值为真.....................后面部分不太懂，请指教！
Constructs a _variant_t object of type VT_UNKNOWN from a COM interface pointer. If fAddRef is true, then AddRef is called on the supplied interface pointer to match the call to Release that will occur when the _variant_t object is destroyed. It is up to you to call Release on the supplied interface pointer. If fAddRef is false, this constructor takes ownership of the supplied interface pointer; do not call Release on the supplied interface pointer.
这个构造函数是什么功能？
msdn英文如下，从一个COM接口指针构造一个VT_UNKNOWN类型的_variant_t对象，如果 fAddRef值为真.....................后面部分不太懂，请指教！
Constructs a _variant_t object of type VT_UNKNOWN from a COM interface pointer. If fAddRef is true, then AddRef is called on the supplied interface pointer to match the call to Release that will occur when the _variant_t object is destroyed. It is up to you to call Release on the supplied interface pointer. If fAddRef is false, this constructor takes ownership of the supplied interface pointer; do not call Release on the supplied interface pointer.