MouseUp

This is a really funny story. It happened in my office, while we (I and my coworkers) were developing a project using Visual Studio Dot Net. We had to built a custom component using standard CheckedListBox. We were discussing where to put some code and for what event. Those of you who have experiences in programming must know what I am talking about. Then I suggested we put the code in an event called "MouseUp". I said, "that is the best event where we have to put the code". But a colleague of mine seem a little bit confused. After a while we finally knew what made him confused. He thought that the event "MouseUp" was triggered when we literally move the mouse up. I said, "if the event triggered when we move the mouse up, how does the computer know we move the mouse up or down?". We laughed about it for a while, then we explained to him and he understood. For your information, the event "MouseUp" is triggered shortly after we release the left or right button of the mouse.