powerbuilder ole control microsoft web browser

This requires that the developer of the target application publicly document its object model.

In order to automate an application, the developer of an automation controller must know the object model that is employed by the target application exporting activation objects. Automation objects are often written in conventional languages such as C++, where C++ attributes can be used to simplify development, Languages such as Visual Basic and Borland Delphi also provides a convenient syntax for Automation which hides the complexity of the underlying implementation. This avoids the need for additional proxy/stub projects for marshalling out-of-process.Īutomation was designed with the ease of scripting in mind, so controllers often provide languages such as Visual Basic for Applications to end users, allowing them to control automation objects via scripts. Specifically, automation interfaces must use SAFEARRAY instead of raw COM arrays.Īutomation-compatible COM servers can, however, rely on the in-built OLE marshalling implementation. To ensure interoperability, automation interfaces are limited to use a subset of all COM types. The confusion has its roots in Microsoft's earlier definition of OLE, which was previously more or less a synonym of COM. As with DDE, in OLE Automation the automation controller is the 'client' and the application exporting the automation objects is the 'server'.Ĭontrary to its name, automation objects do not necessarily use Microsoft OLE, although some Automation objects can be used in OLE environments.

It supersedes Dynamic Data Exchange (DDE), an older mechanism for applications to control one another. set properties of or call methods on) shared automation objects that are exported by other applications. It provides an infrastructure whereby applications called automation controllers can access and manipulate (i.e. All automation objects are required to implement the IDispatch interface. 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. In Microsoft Windows applications programming, OLE Automation (later renamed to simply Automation ) is an inter-process communication mechanism created by Microsoft. ( January 2012) ( Learn how and when to remove this template message) Please help rewrite this article from a descriptive, neutral point of view, and remove advice or instruction. This article is written like a manual or guidebook.

Powerbuilder ole control microsoft web browser