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Event

Meaning in Life

Click

Various events that allow you to interact with the mouse

DoubleClick

MouseEnter

MouseLeave

MouseDown

MouseUp

MouseMove

MouseHover

MouseWheel

KeyPress

Various events that allow you to interact with the keyboard

KeyUp

KeyDown

DragDrop

Various events used to monitor drag-and-drop activity

DragEnter

DragLeave

DragOver

Paint

An event that allows you to interact with the graphical rendering services of GDI+

Finally, the Control base class also defines a number of methods that allow you to interact with

any Control-derived type. As you examine the methods of the Control type, you will notice that a

good number of them have an On prefix followed by the name of a specific event (OnMouseMove,

OnKeyUp, OnPaint, etc.). Each of these On-prefixed virtual methods is the default event handler for its

respective event. If you override any of these virtual members, you gain the ability to perform any

necessary pre- or postprocessing of the event before (or after) invoking your parent’s default imple-

mentation:

public partial class MainWindow : Form

{

protected override void OnMouseDown(MouseEventArgs e)

{