The Delphi IDE and components

Delphi is a Rapid Application Development (RAD) environment: you drag visual components onto a form, set their properties, and write code that responds to events.

• The Form Designer is your app's window; the Tool Palette holds components (TButton, TEdit, TLabel, TListBox, TMemo).
• The Object Inspector sets a component's properties (Name, Caption, Enabled) and wires its events (OnClick).
• Name components meaningfully with a prefix: btnCalc, edtName, lblResult, redOutput.
• Code lives in event handlers — e.g. the button's OnClick procedure runs when the user clicks it.

• Component — a reusable visual/non-visual building block placed on a form.
• Property — a setting of a component (its Caption, colour, size).
• Event — something that happens (a click, a keypress) that your code can respond to.