Usage
Automation 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. Automation objects can be written in conventional languages such as C++, but the C++ syntax for COM (and therefore Automation) is complex and not very programmer-friendly. In contrast, languages such as Visual Basic and Borland Delphi provide a convenient syntax for Automation which hides the complexity of the underlying implementation.
Read more about this topic: OLE Automation
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