Event-driven programming model in WinForms

 

WinForms programs are fundamentally event-driven. The application's flow is driven by events, including user actions (button clicks, key presses, mouse movements), system events (timer ticks, form loading), or alterations in data.

 

Events: signal indicating an occurrence has taken place (e.g., Click, Load, TextChanged).

 

Event Handlers: Functions that are invoked upon the occurrence of a certain event. They generally possess a signature of void SomeMethod(object sender, EventArgs e).

 

Sender: The entity that triggered the event (e.g., the button that was activated).

 

An EventArgs object, or a derived class such as MouseEventArgs or KeyEventArgs, that encompasses event-specific data.

 

Delegates: A fundamental feature in .NET enabling the transmission of methods as arguments. Event handlers are fundamentally delegates.