[Original] About event

As we know, MFC, WPF, or any mature application development framework, they provide xx_click, xx_doubleclick for either whole view/form or any controls to let us easily add our event handler. but a fact shocould be known is that: all such events don't exist on Windows OS! The only primitive events related to mouse shocould be: lbutton_down, lbutton_up, rbutton_down, rbutton_up like. For example:

A left mouse click event shocould be composed of: lbutton_down + lbutton_click + lbutton_up.

B. Double Click Event shocould be composed of: lbutton_down + lbutton_up + lbutton_down + lbutton_doubleclick + lbutton_up

(Above is not that exact, just use it to perform strate the real world of Event)

Take the tricky application event handling for example (it may be a MFC application which internally uses managed code to fire and finally handle events ):

0. User click in the application window area.

1. MFC view will receive a lbutton_down + lbutton_click + lbutton_up event.

2. mycview will use its interopview which is written by C ++/CLI to get the Managed Application written by C # to fire the event to managed code:

Interopview-> application-> eventmanager-> firemouseevent ().

Note: As we can't receive MFC wrapped event like button_click, button_doubleclick while just primitive events, so we need to judge by ourselves whether it's a real click or double click.