Computer Programming Concepts and Visual Basic David I. Schneider

DownloadComplete Triggered when the download is complete, halter, or
failed.
5. If a file on your disk is an HTML document, you can view it as a web page with
the statement WebBrowser1.Navigate “filespec”.
6. Three good books about the Internet are
C.L. Clark, A Student’s Guide to the Internet, Prentice Hall, Inc. 1996.
B. P. Kehoe, Zen and the Art of the Internet, Prentice Hall, Inc. 1996.
K. Hafner and M. Lyon, Where Wizards Stay Up Late: The Origins of the Internet,
Simon & Schuster, 1996.
13.3 WEB PAGE PROGRAMMING WITH VBSCRIPT
Note: This section requires that the Internet Explorer Web browser be installed on your computer.
Web browsers display Web pages created as text files, called HTML 1 [stands for Hyper-
Text Markup Language] documents. The text files can be written with Notepad or any other
word processor. VBScript is a subset of the Visual Basic programming language that is used
to make Web pages interactive. (You can use any VBScript code in VB itself.) In this section,
we learn how to create Web pages with HTML, add controls to Web pages, and write
VBScript code that manipulates the controls.
■ HTML
Here is a typical line in an HTML document.
This sentence will be printed in bold.
The items and are called tags. Here the letter B stands for Bold and the pair of tags
tells the browser to display everything between the two tags in boldface. The first tag is called
the begin tag and the second tag is called the end tag. Most tags come in pairs in which the
second tag differs from the first only in the addition of a slash (/). The combination of pair of
tags and the data characters enclosed by them is called an element. In general, a tag defines
a format to apply or an action to take. A pair of tags tells the browser what to do with the text
between the tags. Some pairs of tags and their effect on the text between them are as follows.
, Display the text in italics
, Display the text underlined.
, Display the text in a size n header (1 ≤ n ≤ 6)
, Display the text one font size larger.
, Display the text one font size smaller.
, Center the text.
, Place the text in the Web page title bar.
An example of a tag that does not come in pairs is , which tells the browser to start
a new paragraph and insert a blank line. A similar tag is which inserts a carriage return
and a line feed to start a new line. The lines
Line One
Line Two
in an HTML document will be displayed as
Line One Line Two
in the Web page, since browsers combine all the white space (including spaces, tabs, and line
breaks) into a single space. On the other hand,
Line One Line Two
Web Page Programming With VBScript 397