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Graphical Applications Fundamentals

 

The Client Area

On a form, the client area is the body of the form without the title bar, its borders and other sections we have not mentioned yet such as the menu, scroll bars, etc:

Client Area

Besides the form, every control also has a client area. The role of the client area is to specify the bounding section where the control can be accessed by other controls positioned on it. Based on this, a control can be visible only within the client area of its parent. Not all controls can be parent.

Design and Run Times

Application programming primarily consists of adding objects to your project. Some of these objects are what the users of your application use to interact with the computer. As the application developer, one of your jobs will consist of selecting the necessary objects, adding them to your application, and then configuring their behavior. There are various ways you can get a control into your application. If you are using Notepad or a text editor to add the objects, you can write code. If you are using Microsoft Visual Basic, you can visually select an object and add it.

To create your applications, there are two settings you will be using. If a control is displaying on the screen and you are designing it, this is referred to as design time. This means that you have the ability to manipulate the control. You can visually set the controlís appearance, its location, its size, and other necessary or available characteristics. The design view is usually the most used and the easiest because you can glance at a control, have a realistic display of it and configure its properties. The visual design is the technique that allows you to visually add a control and manipulate its display. This is the most common, the most regularly used, and the easiest technique.

The other technique you will be using to control a window is with code, writing the program. This is done by typing commands or instructions using the keyboard. This is considered, or referred to, as run time. This is the only way you can control an objectís behavior while the user is interacting with the computer and your program.

 

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