Simply put, a message is some information sent from one place to another. For the most part, Delphi makes message handling easy through its use of events, an event is usually generated in response to a Windows message being sent to an application. However, someday we'll want to process some uncommon messages like: CM_MOUSEENTER which happens (is posted by Windows) when mouse cursor enters the client area of some component (or form).

Learn more about Handling Windows Messages in Delphi.

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