INTRODUCING VISUAL BASIC in .NET

Maker QR Code JIS X 0510 in .NET INTRODUCING VISUAL BASIC

INTRODUCING VISUAL BASIC
QR Code Scanner In VS .NET
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in Visual Studio .NET applications.
Quick Response Code Drawer In Visual Studio .NET
Using Barcode generator for .NET Control to generate, create QR Code ISO/IEC18004 image in .NET applications.
button, or by selecting Continue from the Run menu. To end the execution, simply click on the End button, or select End from the Run menu.
Denso QR Bar Code Scanner In .NET Framework
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Barcode Maker In .NET Framework
Using Barcode generation for .NET framework Control to generate, create barcode image in VS .NET applications.
1.12 GETTING HELP Visual Basic includes many intricate concepts, predefined identifiers, detailed syntactic requirements, etc. more than you can remember at any one time. Fortunately, Visual Basic also includes an excellent on-line help facility, which will answer most questions and provide detailed information, with examples, of various Visual Basic features. To access the help feature, press function key F1 or select Contents, Index or Search from the Help menu. Fig. 1.7 shows the help window that is obtained by pressing F1, or by selecting Help/Index. Notice the tabs at the left side of the window, which allow you to select the Contents, Index, Search or Favorites window for viewing.
Bar Code Scanner In .NET Framework
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
QR Drawer In C#.NET
Using Barcode creation for .NET Control to generate, create QR image in Visual Studio .NET applications.
Fig. 1.7 The Help window 1.13 A SAMPLE VISUAL BASIC PROJECT The following example shows the overall process used to create a Visual Basic project. Our primary emphasis is on the use of controls to create a user interface. When reading through this example, try to focus on the big picture and ignore the details, which are discussed in later chapters.
Print Denso QR Bar Code In .NET
Using Barcode maker for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
Drawing QR-Code In VB.NET
Using Barcode drawer for .NET framework Control to generate, create QR image in Visual Studio .NET applications.
INTRODUCING VISUAL BASIC
Bar Code Creator In .NET
Using Barcode encoder for .NET framework Control to generate, create barcode image in VS .NET applications.
EAN128 Generation In Visual Studio .NET
Using Barcode generation for .NET Control to generate, create GS1 128 image in .NET applications.
[CHAP. 1
Bar Code Generation In Visual Studio .NET
Using Barcode creation for .NET Control to generate, create bar code image in VS .NET applications.
Make ISSN - 10 In Visual Studio .NET
Using Barcode creation for VS .NET Control to generate, create ISSN - 10 image in Visual Studio .NET applications.
EXAMPLE 1.1 AREA OF A CIRCLE
UCC.EAN - 128 Creator In C#.NET
Using Barcode printer for .NET Control to generate, create GTIN - 128 image in VS .NET applications.
Make Code128 In None
Using Barcode printer for Font Control to generate, create Code 128 Code Set C image in Font applications.
In this example, we create a project that calculates the area of a circle. The user enters a value for the radius, and then clicks on the Go button. The corresponding area will then be displayed, as illustrated in Fig. 1.8.
UCC - 12 Drawer In Objective-C
Using Barcode encoder for iPhone Control to generate, create UCC - 12 image in iPhone applications.
Make Code 3 Of 9 In Java
Using Barcode drawer for Eclipse BIRT Control to generate, create Code 3/9 image in BIRT reports applications.
Fig. 1.8
Recognizing USS Code 39 In .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET applications.
Code-39 Creation In Java
Using Barcode generator for Java Control to generate, create Code 39 Extended image in Java applications.
We begin by opening Visual Basic and selecting Standard EXE from the New tab in the New Project menu (see Fig. 1.2). This causes a blank Form Design Window to be displayed, as shown in Fig. 1.9 (see also Fig. 1.3).
Bar Code Generation In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create bar code image in VS .NET applications.
Creating Code 128C In VB.NET
Using Barcode maker for VS .NET Control to generate, create ANSI/AIM Code 128 image in Visual Studio .NET applications.
Fig. 1.9
We then place the necessary controls in the Form Design Window. In particular, we place two labels, two text boxes, two command buttons, and a geometric shape on the form, as shown in Fig. 1.10. Each control is selected from the Toolbox, which is positioned to the left of the Form Design Window (see Fig. 1.3). Note that the controls are automatically called Label1, Label2, Text1, Text2, Command1, and Command2, and the Form Design Window is called Form1. The geometric shape has no default name.
CHAP. 1]
INTRODUCING VISUAL BASIC
Each control can be selected two different ways. You can click on the desired control icon within the Toolbox, then click on the control s location within the Form Design Window, and then drag the mouse until the control has the desired size and shape. Or, you can double-click on the desired control icon within the Toolbox, placing the control at the center of the Form Design Window. You can then drag the control to its desired location and resize the control by dragging one of its edges or corners. (In Fig. 1.10, the controls have been placed in their approximate desired locations but they have not been resized.) If you change your mind, you can delete a control by highlighting the control (clicking on it) and then pressing the Delete key.
Defining the Interface Control Properties Object Form1 Label1 Label2 Property Name Caption Caption Font Caption Font
The next step is to define an appropriate set of properties for each control. Since the controls already have default properties associated with them, the actual process generally involves changing only a few of the defaults. The properties associated with each control are displayed in the Properties Window (see Fig. 1.11 below). To view the properties, simply activate the control by clicking on it. You may then choose a property from the list shown in the left column of the Properties Window. The current value of that property is shown in the adjoining location within the right column.To change the value of the property, either type in a new value, or select from the list of values shown in the dropdown menu. In Fig. 1.11, for example, the active control is Label1. The Properties Window shows the properties associated with this control. The Caption property is highlighted, showing Label1 as the current (default) value. If we change this value to Radius:, then the window will appear as in Fig. 1.11. Note that the new value for the Caption is Radius:. This new value also appears in the Form Design Window (see Fig. 1.12), where the control is now shown as Radius:. The (nondefault) property values for each object (i.e., for the form and each of the seven controls) are summarized below. Value Circle Area of a Circle Radius: MS Sans Serif, 10-point Area: MS Sans Serif, 10-point
Copyright © OnBarcode.com . All rights reserved.