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Automation allows programmers to expose objects within a program for use by other applications. The exposed objects provide the means by which different applications can interact with each other and the operating system. Automation is a standard based on Microsoft's Component Object Model (COM).
It is not necessary to understand all the intricacies of Automation or COM in order to utilize the functionality they provide. Automation evolved from what was once called OLE, which stands for Object Linking and Embedding.
This allowed you to take a particular object such as a spreadsheet and embed it into another object such as a text document. Changes to values in the spreadsheet would automatically be updated in the text document. This was a very powerful feature and was available to users without the added complexity of writing code. It was simply a matter of cutting and pasting the objects.
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