Resize Controls

You can give the main application window and dialog boxes the ability to change sizes based on a user's preference. In previous versions of Visual Basic, this involved writing a long and sometimes complex resize event handler. Now, however, each component in VB .NET provides properties to resize without requiring any code. Each control contains two properties for resizing Anchor and Dock. Anchor lets you select sides of the control you want to anchor to container borders. The Left and Top...

Draw Bitmaps And Images

Ou can add images to a form in conjunction with drawing commands. The PictureBox control provides a simple way to load an image onto the form, but you cannot draw around the PictureBox, unless you contain all of the drawing inside. You can use commands from the System.Drawing namespace to draw images onto the form without using a control. Two classes provide the ability to work with bitmapped images. You more commonly use the Bitmap class to load a raster image from a file, create an instance...

Using Regions

Windows GDI+ enables you to create complex areas of space defined as a region. A region consists of any number of rectangles and paths that build a contained area of space. The Region class that VB .NET provides represents a region. Windows uses a region to determine the shape of a window. For more information on creating a shaped window, see the section Create a Shaped Window. To create a region, declare a new instance of the Region class using Dim combined with the New operator. The class is...

Info

Distributed in the United States by Hungry Minds, Inc. Distributed by CDG Books Canada Inc. for Canada by Transworld Publishers Limited in the United Kingdom by IDG Norge Books for Norway by IDG Sweden Books for Sweden by IDG Books Australia Publishing Corporation Pty. Ltd. for Australia and New Zealand by TransQuest Publishers Pte Ltd. for Singapore, Malaysia, Thailand, Indonesia, and Hong Kong by Gotop Information Inc. for Taiwan by ICG Muse, Inc. for Japan by Intersoft for South Africa by...

Edit Data In A Datagrid

You may want to provide a table of information to a user, and let them update information in the database directly over the Web. The DataGrid control can automatically provide edit controls for the user to add, edit, and update database records. Because database binding in Web Forms provides only support for reading information form a database, you must add the code to your application to perform the individual adding, editing, and updating actions. You can add buttons to the DataGrid control...

E

Visual Basic Property Editor, 31 Visual Collection Editor, 52 ellipses, 148 draw, 149, 154 filling, 149 graphics, 148 enumeration, 309 dashcap, 145 FillMode, 151 linecap, 145 linejoin, 145 error, 22-23, 44 color, 249 column, 224 constant, 263 database, 214 design-time, 300 messages, 54, 80-81, 244 provider, 28, 80-81, 218, 224-225 recover, 303-305 runtime, 300-301 set, 80-81, 224 validation, 249 exponentiation, 91 expression, 213 description, 247 regular, 246-247 sort, 255

Accept Incoming Connections

Create a new project or open an existing one. < On a new line, type server.Start(), replacing server with the name of the TCPListener variable. Create a new project or open an existing one. 0 In the appropriate method, type Dim server As New Net.Sockets. TcpListener(90), replacing server with the variable name and 90 with the port. < On a new line, type server.Start(), replacing server with the name of the TCPListener variable. _Q Type Dim mySocket As Net.Scokets.Socket...

About The Author

Richard Bowman owns and operates BowmanSoft, Inc., which specializes in software consulting and Internet development technolgies. Richard is also the editor and owner of the Visual Basic Web Magazine, a Web resource site focusing on Visual Basic and ASP programming. You can visit VBWM at http www.vbwm.com . You can reach the author at richard bowmansoft.com. The last few months have been a long and arduous journey. I never knew how stressful a project could be until I took on the process of...

Hinnt

-Q To list the contents of the directory, declare a storage variable and create a loop to access the contents of the directory. The example declares a subDirectory variable and creates a For Each loop. Autos I E Locals j I Watch 1 J Call Stack I IS Breakpoip Command B Output class responds with file and directory listings, and by manipulating the underlying directory structure.

Description

Provides extensive local privileges, and presents the computer's credentials to remote servers. Acts as a non-privileged user on the local computer, and presents anonymous credentials to remote servers. Authenticates using the domain controller's or workgroup Service account. Acts as a non-privileged user on the local computer, and presents the computer's credentials to remote servers. F C WirHNT 5ystem32 cmd.eHe BE E3 C Documents and SetPJ tingsSfldninistratoi'NMii Documents Uisual Studio Pi*o...

Note Vb Net uses the filename without the extension to create a project name

Optionally, you can type a new folder or click Browse to change where VB .NET creates the project folder. VB .NET creates the project and opens its default resource. 0 Type a filename for the project. Optionally, you can type a new folder or click Browse to change where VB .NET creates the project folder. VB .NET creates the project and opens its default resource.

Value Range

4028235e38

January 1, 1 CE to December 31, 9999 with no decimal point -7.9228162514264337593543950335 with 28 places to the right of the decimal-smallest non-zero number is -0.0000000000000000000000000001 1.79769313486231E308 to -4.94065645841247E-324 for negative values 4.94065645841247E-324 to 1.79769313486232E308 for positive values -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 -3.4028235E38 to -1.401298E-45 for negative values 1.401298E-45 to 3.4028235E38 for positive values Ch4...

Create A Data Relationship

In most cases, a single table of a database does not store all of the information that makes up the necessary data for an application. Various tables store different parts of the information, and you combine the data from the various tables to create an application that allows the user to modify all of the related data in an effective way. You can define data relationships in your Visual Basic .NET application to create complex data displays easily. For example, if you have a database...

Create A Print Preview

Any modern applications enable the user to preview his or her print job before choosing to print it. You can add this powerful feature to your application using the PrintPreviewDialog. This control takes all the pages printed by a PrintDocument control and maps them onto a virtual onscreen page. The PrintPreviewDialog control also provides an easy to use and familiar dialog box with a toolbar of display options and a panel to show the page or pages in the print job. To use the control, you need...

Programming In Visual Basic

You can use the Console object to perform asynchronous reading and writing in a console application. This means you can run a block of code in an application without stopping for input. You can then check the input buffer at your leisure. To start an asynchronous read, use the Console.OpenStandardInput method. VB .NET provides a method BeginRead that sets up the buffer to store the characters. In the code below, the Sub Main procedure enters an infinite loop where it never polls for input, but...

Using Validation Controls

Operator jJ and Type to select a value. Create a new Web Application project or open an existing one. 0 Add necessary input controls to the form and validation controls to the form. Note See the sections Create a Web Application to create a new project and Using a Web Form to add controls. 0 In the Properties window, click the 0 and click the appropriate input control. Type an error message into the ErrorMessage property. -0 For the CompareValidator, click ControlToCompare's 0 and select a...

Provide Error Messages

You can use the ErrorProvider control to alert a user to a data entry error by displaying an unobtrusive small error icon. The ErrorProvider control allows you to show an error message related to a control without bringing up a message box that stops the user's flow of information entry. The ErrorProvider provides three properties to all of the controls on a form that allow you to monitor the controls for errors. The properties the provider adds to controls are Error, IconAlignment, and...

How To Use This Book

Visual Basic .NET Your visual blueprint for building versatile programs on the .NET Framework uses simple, straightforward examples to teach you how to create powerful and dynamic programs. To get the most out of this book, you should read each chapter in order, from beginning to end. Each chapter introduces new ideas and builds on the knowledge learned in previous chapters. When you become familiar with Visual Basic .NET Your visual blueprint for building versatile programs on the .NET...