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In Microsoft Windows applications programming, OLE Automation (later renamed to simply Automation [1] [2]) is an inter-process communication mechanism created by Microsoft.It is based on a subset of Component Object Model (COM) that was intended for use by scripting languages – originally Visual Basic – but now is used by several languages on Windows.
IDispatch is the interface that exposes the OLE Automation protocol. [1] Extending IUnknown , it is one of the standard interfaces that can be exposed by COM objects. COM distinguishes between three interface types: custom that are VTABLE-based IUnknown interfaces, dispatch that are IDispatch interfaces supporting introspection, and dual ...
Microsoft Data Access Components (MDAC), including: OLE DB; Cryptographic API (CAPICOM) ActiveX Data Objects (ADO) Collaboration Data Objects (CDO); Windows Runtime (WinRT) Universal Windows Platform (UWP) DirectShow; DirectX. Direct2D; Direct3D; DirectDraw; DirectInput; DirectMusic; DirectPlay; DirectSetup; DirectSound; DirectWrite; XACT ...
COM is the basis for other Microsoft domain-specific component technologies including OLE, OLE Automation, ActiveX, COM+, and DCOM as well as implementations such as DirectX, Windows shell, UMDF, Windows Runtime, and Browser Helper Object. COM enables object use with only knowing its interface; not its internal implementation.
The COM support in Microsoft Visual C++ allows developers to create a variety of COM objects, OLE Automation servers, and ActiveX controls. [1] [2] ATL includes an object wizard that sets up primary structure of the objects quickly with a minimum of hand coding. On the COM client side ATL provides smart pointers that deal with COM reference ...
The AOL Desktop Gold Download Manager allows you to access a list of your downloaded files in one convenient location. Use the Download Manager to access and search downloads, sort downloads, web search similar items, and more. Open the Download Manager to access a download
1. Launch AOL Desktop Gold. 2. On the sign on screen, click the small arrow pointing down. 3. Click Add Username. 4. Type in another username and click Continue.Enter your password in the window that appears.
In OLE Automation the IDispatch interface is used when the class of an object cannot be known in advance. Hence when calling a method on such an object the types of the arguments and the return value is not known at compile time.