What Is a Component?
Components are the building blocks developers use to design the user interface and provide some non-visual capability to their applications. As far as applications developers are concerned, a component is something developers get from the Component Palette and place on their forms. From there, they can manipulate the various properties and add event handlers to give the component a specific appearance or behavior. From the perspective of a component writer, components are objects in Object Pascal code. These objects can encapsulate the behavior of elements provided by the system (such as the standard Windows controls). Other objects can introduce entirely new visual or non-visual elements; in which case a component's code ...
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