Classes

Class AutomationObject() Foundation

Class function of the AutomationObject class

Description

Objects of the class AutomationObject serve as proxies to COM/ActiveX components. The properties and methods of the COM/ActiveX component can be accessed via instance variables and methods of the AutomationObject.

For an overview on how an AutomationObject can be used please also be referred to ActiveX Overview .

AutomationObjects can be created and connected to COM/ActiveX components by the functions GetObject() and CreateObject()and by calling the class method AutomationObject():create().

Once the AutomationObject is created and the connection to the COM/ActiveX object is established, calling methods and accessing properties of the COM/ActiveX component is as easy as with ordinary Xbase++ objects. The AutomationObject takes care of forwarding method and property calls to the COM/ActiveX object.

Class methods
:create()
Creates and connects to a COM/ActiveX object
Life cycle
:destroy()
Disconnects from a COM/ActiveX component.
:dynamicCast()
Converts (casts) an AutomationObject instance to another class.
IUnknown
:addRef()
Increments the reference count.
:release()
Decrements the reference count.
:queryInterface()
Queries a dedicated interface
IDispatch
:getIDsOfNames()
Queries the dispatch IDs of properties and methods
:invoke()
Invokes a method or property.
ActiveX access
:loadTypeLib()
Loads a typelibrary.
:getProperty()
Gets the value of a property.
:setProperty()
Sets the value of a property
:callMethod()
Calls a method.
Automation Error Management
:onError()
Default error handler for errors generated in the automation sub-system.
COM class management
:isInstalled()
Determines if a COM/ActiveX component is installed on the computer.
:requestLicenseKey()
Requests the license key of a COM/ActiveX component.
:translateColor()
Translates a COM/ActiveX color value to an Xbase++ color and vice versa
Instance variables
:interface
Interface of the connected COM/ActiveX object.
:interfaceName
Name of the COM interface used to connect to the COM/ActiveX object.
:license
Optional license string.
:CLSID
Class ID or ProgID identifying the COM object connected.
:server
Name of the remote machine/server that hosts the COM/ActiveX component.
:cargo
Instance variable for storing an application-defined value.
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