Ten problems about visual programming
1? What is visual programming?
Visual programming is a brand-new programming method, which mainly allows programmers to use various controls provided by the software itself to construct various interfaces of application programs like building blocks.
2? What are the advantages of visual programming?
The biggest advantage of visual programming is that designers can complete the design of application programs without writing or with little program code, which can greatly improve the work efficiency of designers.
3? What languages can be used for visual programming?
There are many languages that can be used for visual programming, such as Microsoft's Visual Basic, Visual C++, Chinese Visual Foxpro and Borland's Delphi.
4? What are the basic concepts in visual programming?
The main basic concepts are forms, components, properties, events, methods and so on.
5? What is a form?
A form refers to a window when programming. We mainly arrange the running interface of the application by placing various components (such as command buttons, check boxes, radio boxes, scroll bars, etc.). ) in form.
6? What is a component?
The so-called components are all kinds of components that make up the program running interface, such as command buttons, check boxes, radio boxes, scroll bars and so on.
7? What is an attribute?
Attributes are characteristics of components. It explains how the component is displayed, what is its size, where it is displayed, whether it is visible or not, and whether it is valid. ...
8? What categories can attributes be divided into?
Attributes can be divided into three categories: design attributes: attributes that can play a role in design; Running attribute: this attribute only works during the running of the program; Read-only attribute: an attribute that can only be viewed and cannot be changed.
9? What is an event?
Events are operations on components. If you click a command button with the mouse, clicking the mouse is called a click event here.
10? What is the method?
A method is a specific operation to be performed after an event occurs, similar to the previous program. For example, if we click the "Exit" command button with the mouse, the program will finish running by executing a command, and the execution process of the command is called a method.