Your application can respond to the mouse actions: mouse-button down, mouse moved, and mouse-button up. It can also respond to a click (a complete press-and-release, all in one place) that can be generated by some kinds of keystrokes (such as pressing Enter in a modal dialog box). 

This topic describes:

• What's in a mouse event.
• Responding to a mouse-down action.
• Responding to a mouse-up action.
• Responding to a mouse move.