Shulou(Shulou.com)06/03 Report--

This article introduces the implementation of the interface and the implementation and use of QueryInterface, the content is very detailed, interested friends can refer to, I hope it can be helpful to you.

# include # include using namespace std

Interface IX: public IUnknown

{

Virtual void _ stdcall Fx () = 0

}

Interface IY: public IUnknown

{

Virtual void _ stdcall Fy () = 0

}

Interface IZ: public IUnknown

{

Virtual void _ stdcall Fz () = 0

}

Static const IID IID_IX = {0xff5ba880, 0xa371, 0x4a42, {0x87, 0x20, 0x96, 0xe0, 0x4d, 0x68, 0xd, 0x76}}; / / {FF5BA880-A371-4a42-8720-96E04D680D76}

Static const IID IID_IY = {0xde44d538, 0xe926, 0x4d5f, {0x94, 0x5d, 0x61, 0x83, 0x86, 0x7c, 0x63, 0x41}}; / / {DE44D538-E926-4d5f-945D-6183867C6341}

Static const IID IID_IZ = {0x91157d15, 0x22b1, 0x45d9, {0xb4, 0xc9, 0x81, 0x3, 0x8d, 0xec, 0xef, 0xad}}; / / {91157D15-22B1-45d9-B4C9-81038DECEFAD}

Class CA: public IX

Public IY

{

Public:

Virtual HRESULT _ stdcall QueryInterface (REFIID riid, _ _ RPC__deref_out void * * ppvObject)

Virtual ULONG _ stdcall AddRef () {return 0;}

Virtual ULONG _ stdcall Release () {return 0;}

Virtual void _ stdcall Fx () {cout

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