The following classes manage a given interface pointer:
CComPtr Performs automatic reference counting.
CComQIPtr Similar to CComPtr, but also performs automatic querying of interfaces.
CInterfaceArray Provides methods useful when constructing an array of COM interface pointers.
CInterfaceList Provides methods useful when constructing a list of COM interface pointers.
CComGITPtr Provides methods for dealing with interface pointers and the global interface table (GIT).