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This article is to share with you about AddRef and Release how to carry out citation counting, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article. Let's take a look at it.

# 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 = {0xec53e1de, 0x37d, 0x48f5, {0xa1, 0xee, 0x2d, 0xf5, 0xa5, 0xde, 0xf3, 0x49}}; / / {EC53E1DE-037D-48f5-A1EE-2DF5A5DEF349}

Static const IID IID_IY = {0x4c510b77, 0xc63a, 0x4e0f, {0xa2, 0x45, 0x7b, 0x21, 0x23, 0x12, 0x23, 0xe7}}; / / {4C510B77-C63A-4e0f-A245-7B21231223E7}

Static const IID IID_IZ = {0xefb1f8d4, 0x674e, 0x4123, {0xa9, 0x19, 0x3c, 0x72, 0xee, 0xe8, 0x1d, 0x92}}; / / {EFB1F8D4-674E-4123-A919-3C72EEE81D92}

Class CA: public IX

Public IY

{

Public:

CA (): m_cRef (0) {}

Virtual ~ CA () {}

Public:

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

Virtual ULONG _ stdcall AddRef ()

Virtual ULONG _ stdcall Release ()

Virtual void _ stdcall Fx () {coutRelease (); / / need to correspond to these five places

}

IZ * pIZ = NULL; / / did not execute to AddRef, so no need to release

Hr = pIUnk- > QueryInterface (IID_IZ, (void**) & pIZ)

If (SUCCEEDED (hr))

{

Cout

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