com 名字对象(1)IBindCtx

一.IBindCtx

Provides access to a bind context, which is an object that stores information about a particular moniker binding operation.

How to create

IBindCtx* bindCtx=NULL;
CreateBindCtx(0,&bindCtx);

二.object active status

1.RegisterObjectBound

Registers an object with the bind context to ensure that the object remains active until the bind context is released.

IBindCtx* bindCtx=NULL;
CreateBindCtx(0,&bindCtx);

HRESULT hr;
IUnknown* pUnk = NULL;
hr = CoCreateInstance(CLSID_DuckDoer, NULL, CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pUnk);
bindCtx->RegisterObjectBound(pUnk);
//still alive
pUnk->Release();
//real release
pUnk->Release();

2.RevokeObjectBound

Removes the object from the bind context, undoing a previous call to RegisterObjectBound.

bindCtx->RegisterObjectBound(pUnk);
bindCtx->RevokeObjectBound(pUnk);
//release
pUnk->Release();

//pUnk->AddRef()
bindCtx->RegisterObjectBound(pUnk);
//still release
pUnk->Release();
//real release==pUnk->Release();
bindCtx->RevokeObjectBound(pUnk);

3.ReleaseBoundObjects

Releases all pointers to all objects that were previously registered by calls to RegisterObjectBound.

4.ObjectParam

1. RegisterObjectParam    Associates an object with a string key in the bind context's string-keyed table of pointers.
2. GetObjectParam Retrieves an interface pointer to the object associated with the specified key in the bind context's string-keyed table of pointers
3. RevokeObjectParam Removes the specified key and its associated pointer from the bind context's string-keyed table of objects
4. EnumObjectParam  Retrieves a pointer to an interface that can be used to enumerate the keys of the bind context's string-keyed table of pointers
    

bindCtx->RegisterObjectParam(OLESTR("testKey"),pUnk);
IUnknown* pUnk2 = NULL;
bindCtx->GetObjectParam(OLESTR("testKey"),&pUnk2);

5.Options

1. SetBindOptions Sets new values for the binding parameters stored in the bind context.
2. GetBindOptions

6.com memory

reference:http://www.vckbase.com/document/viewdoc/?id=1493