tailieunhanh - Wrox’s Visual Basic 2005 Express Edition Starter Kit phần 2

Class - Định nghĩa của một cái gì đó để được sử dụng trong lập trình. Các lớp học định nghĩa của một đối tượng trang điểm, trong khi một đối tượng thực hiện một cấu trúc lớp cho một trường hợp cá nhân. hoặc thiết lập các hành động chống lại các đối tượng. Một đối tượng người có thể có một GoToSleep | Why Do All That Work Quick Reference Glossary As you read through Wrox s Visual Basic 2005 Express Edition Starter Kit you may find yourself encountering the following programming terms. Use the definitions provided here as a cheat sheet to help remember what they all mean Class The definition of something to be used in the programming. The class defines an object s makeup while an object implements a class structure for an individual instance. Object A discrete piece of data that is defined by a class including public elements and internal data Property A descriptive element of an object. Properties are defined in the class and normally describe the object in some way. For example name date of birth and phone number are all properties of a Person object. Method A function belonging to an object that can be called by other parts of the program. Usually methods will perform an action or set of actions against the object. A Person object may have a GoToSleep method which puts it into a sleep state. Event A predefined occurrence that the object knows about and can communicate to other parts of a program. Events are intercepted by event handlers and can convey to the recipient code information that is necessary for it to function properly. The Person object could have a GoneToSleep event that is raised whenever the object s sleep state is activated. Here are some other basic programming terms you ll need to remember as you progress through this book Function A subroutine that can accept pieces of data as input and return another data element as output. Variable A special kind of object that contains a single piece of data such as some text or a number. Variables store this information so you can retrieve it later. Control A special kind of object that you can put on a window or form that behaves in a specific manner. Examples of controls are Buttons TextBoxes and ListBoxes. The final thing to note at this point is that you can refer to objects within objects as well. .