smnb

CoInitializeEx Function (COM)
CoGetClassObject Function
CoUninitialize Function (COM)
CLSIDFromProgID Function (COM)
VARIANT 構造体

CComPtr	ATL class
_com_ptr_t	an COM support classes to support non ATL COM development

comdef.h
comsuppw.lib

_bstr_t
_com_error
_com_ptr_t
_variant_t

wrappers of basic COM functionality.
like COM smart pointer typedefs over raw COM inteface classes works just by using tlb file.

view sourceprint?
1 _COM_SMARTPTR_TYPEDEF(IMyInterface, __uuidof(IMyInterface));
This above line declares _com_ptr_t specialization IMyInterfacePtr.

The library to link to for using COM support classes is comsuppw.lib.

基本的なCOMのインタフェース:IUnknown

Wiki
Component Object Model (COM) basics
C++ から COM 経由で Internet Explorer を操作する(Late Binding 版)
C++でCOMクライアント
Introduction to COM - What It Is and How to Use It.

• COM is : a method for sharing binary code across different applications and languages.
• COM specifies that the binary modules (the DLLs and EXEs) must be compiled to match a specific structure.
• The standard also specifies exactly how COM objects must be organized in memory.
• The binaries must also not depend on any feature of any programming language (such as name decoration in C++).
• Unicode

interface	Multiple inheritance is not allowed with interfaces
component object class	contained in a DLL or EXE implement interfaces
a COM object	an instance of a component object class in memory
a COM server	a binary (DLL or EXE)
Registration	the process of creating registry entries
Unregistration	removing the registry entries
a GUID	globally unique identifier,a 128-bit number
a class ID CLSID	a GUID that names a component object class
an interface ID IID	a GUID that names an interface
HRESULT	an integral type used by COM to return error and success codes

	Create	Delete
C++	use operator new~	use operator delete
	create an object on the stack	let a stack object go out of scope
COM	call an API in the COM library	all objects keep their own reference counts. The caller must tell the object when the caller is done using the object. COM objects free themselves from memory when the reference count reaches 0
	HRESULT CoCreateInstance ( REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, LPVOID* ppv );	pISL->Release();

param	contents	memo
rclsid	CLSID	ex) CLSID_ShellLink
pUnkOuter	Aggregating COM objects	which is a way of taking an existing component object class and adding new methods to it NULL to indicate not using aggregation
dwClsContext	kind of COM servers	ex) CLSCTX_INPROC_SERVER you should not use CLSCTX_ALL (which is the default in ATL) because it will fail on Windows 95 systems that do not have DCOM installed
riid	IID	ex)IID_IShellLink
ppv	Address of an interface pointer

AddRef()	Tells the COM object to increment its reference count	Use when to have a copy of an interface pointer
Release()	Tells the COM object to decrement its reference count
QueryInterface()	Requests an interface pointer from a COM object	use when a component object class implements more than one interface

HRESULT IUnknown::QueryInterface (
    REFIID iid,
    void** ppv );

iid	IID
ppv	Address of an interface pointer

Nr.	single REFIID	multiple REFIID
1	Initialize the COM library		CoInitialize(NULL);
2	Create a COM object A, and get an interface a		CoCreate(...,&a);
3	Call the method of the COM object		a->func()
4	N/A	Call QueryInterface() on the COM object B and get another interface b	a->QueryInterface(...,&b);
5	N/A	Call the method of the COM object	b->func()
6	Release the interface a		a->Release()
7	N/A	Release the interface b	b->Release()
8	Uninitialize the COM library		CoUninitialize();

1.Initialize the COM library.
2.Create a COM object used to create shortcuts, and get an IShellLink interface.
3.Call the SetPath() method of the IShellLink interface.
4..
5.Call the Save() method of the IPersistFile interface.
6.Release the interfaces.
7.Uninitialize the COM library.

c:\Program Files\Microsoft SDKs\Windows\v6.0\Include\WinError.h

severity bit	indicate success or failure
the facility code	source component/program of HREULT	16-bits

|the status code||.

HRESULT	Facility	Severity	Status
REGDB_E_READREGDB	REGDB(registry database)	E(error}	READREGDB (a description of the error}
S_OK	(none)(generic)	S (success)	OK(description of status)

HRESULT		cases
0x800401F0	CO_E_NOTINITIALIZED	forgot to call CoInitialize() before CoCreateInstance()

Microsoft Exchange Server Error Code Look-up

INFO: OLE Threads Must Dispatch Messages
HTML 通知の処理
[[IEコンポーネントの使い方 [VC++の使い方]>http://www.nitoyon.com/vc/tips/ie_component.htm]]
Sink Events
BHO (Browser Helper Objects)
IE Programming
Google Answers: Recieving events from Internet Explorer
Keeping an Eye on Your Browser by Monitoring Internet Explorer 4.0 Events
Display a Web Page in a Plain C Win32 Application

ATL と MFC の文字列変換マクロ
USES_CONVERSIONマクロは、ATL(Active Template Library)で提供される文字コード変換用マクロを利用する前に必ず宣言しなければならなかったが、
ユニコード統一で、不要になった。

ATL と MFC の文字列変換マクロ

C++/CLIでCreateInstance呼んでいるところと
COM の初期化 不要
共通言語ランタイムは、モジュールが初期化されると自動的に COM を初期化します (自動的に初期化される場合、COM は MTA として初期化されます)。その結果、明示的に COM を初期化すると、COM が既に初期化されていることを示すリターン コードが生成されます。COM が CLR によって既にいずれかのスレッド モデルに初期化されている場合、別のスレッド モデルを使用して明示的に COM を初期化しようとすると、アプリケーションが失敗するおそれがあります。

COM/COM+ セキュリティ (その 1)
"Windows XP Service Pack 2 セキュリティ強化機能搭載" での機能の変更点 ‐ 第 2 部 : ネットワーク保護技術

C++ マネージ拡張と COM の相互運用性に関するチュートリアル
カスタム ランタイム呼び出し可能ラッパーの実装
TlbImp.exe で生成された相互運用機能アセンブリの使用
方法 : Tlbimp.exe を使用してプライマリ相互運用機能アセンブリを生成する