By Jerry Anderson
ActiveX improvement is on the verge of collapse of an grand explosion of chances. in the event you take part in any respect on the web newsgroups or mail lists, you recognize what we suggest. The variety of builders doing ActiveX improvement has elevated dramatically. the kind of improvement and the extent of class that functions are helping are outstanding. all of the paintings that Microsoft has performed during the last 5 plus years, beginning with OLE 2, is starting to pay off.I be mindful sitting in an auditorium 5 years in the past hearing a and one-half hour lecture on OLE Automation and considering, "Great, simply what we'd like . . . one other macro language!," and likewise considering that I had no clue what OLE was once going to do for improvement and the home windows platform. good OLE 2 took we all to new degrees within the improvement of built-in components.With the arrival of ActiveX, the longer term is asking brighter than ever. This publication is dedicated to bringing that expertise all the way down to earth and into your fingers. After analyzing this booklet, you want to consider convinced that you should take on any venture or software concerning ActiveX, COM, and home windows.
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Additional resources for ActiveX Programming with Visual C++
Microsoft Word and Microsoft Excel are examples of the OLE Document architecture. If an Excel spreadsheet is embedded in a Word document, the spreadsheet is actually stored with the Word document and is an integral part of it. ActiveX Documents also have the added capability of being published as Web pages on the Internet or on a corporate intranet. Imagine an in-house tracking system for purchase orders run from the same Web browsers that are used to connect to the Internet. Containers ActiveX Containers are applications that can host Automation Servers, Controls, and Documents.
These servers are known as dual-interface Servers. The IDispatch interface of the Automation Server also has a companion COM interface describing the methods and properties of the Object. Automation Controllers such as VB can take advantage of these dual interfaces to provide even greater performance when using the Server. The one drawback to dual-interface Servers is that they are limited to the set of data types supported by OLE Automation when defining methods and properties. Documents ActiveX Documents, or DocObjects as they were originally called, represent Objects that are more than a simple Control or Automation Server.
The Windows 95 and NT operating systems contain hundreds of COM Objects and Custom interfaces as extensions to the operating systems for controlling everything from the appearance of the desktop to the rendering of 3-D images on the screen. COM Objects are a good way to organize a related set of functions and data, while still maintaining the needed high-speed performance of a DLL. NOTE: Automation Servers can also benefit from COM interfaces. These servers are known as dual-interface Servers. The IDispatch interface of the Automation Server also has a companion COM interface describing the methods and properties of the Object.