Queries a COM object for a pointer to one of its interface.
Note:
Because you pass the address of an interface pointer,
the method can overwrite that address with the pointer to the interface being queried for.
Upon successful return, *ppvObject (the dereferenced address) contains a pointer to
the requested interface.
If the object doesn't support the interface, the method sets *ppvObject
(the dereferenced address) to null.
Queries a COM object for a pointer to one of its interface.
Note: Because you pass the address of an interface pointer, the method can overwrite that address with the pointer to the interface being queried for. Upon successful return, *ppvObject (the dereferenced address) contains a pointer to the requested interface. If the object doesn't support the interface, the method sets *ppvObject (the dereferenced address) to null.