The method supports the standard return value E_FAIL, as well as the following:

S_OK

The object was disconnected successfully.

This method is implemented on the object, not the proxy.

To determine whether the platform supports this interface, see Determining Supported COM APIs.

The usual case in which this method is called occurs when a user forcibly closes a COM server that has one or more running objects that implement IMarshal.

Prior to shutting down, the server calls the CoDisconnectObjecthelper function to sever external connections to all its running objects.

For each object that implements IMarshal; however, this function calls IMarshal::DisconnectObject, so that each object that manages its own marshaling can take steps to notify its proxy that it is about to shut down.

As part of its standard shutdown code, a server should call the CoDisconnectObjectfunction, which in turn calls IMarshal::DisconnectObject, on each of its running objects that implements IMarshal.

The outcome of any implementation of this method should be to enable a proxy to respond to all subsequent calls from its client by returning RPC_E_DISCONNECTED or CO_E_OBJECTNOTCONNECTED rather than attempting to forward the calls on to the original object. It is up to the client, of course, to destroy the proxy.

If you are implementing this method for an immutable object, such as a moniker, your implementation does not need to do anything because such objects are typically copied whole into the client's address space. Therefore, they have neither a proxy nor a connection to the original object.

For more information on marshaling immutable objects, see IMarshal.