February 2008
Intermediate to advanced
1247 pages
31h 55m
English
Content preview from Visual Basic® 2008 Programmer's ReferenceBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 38. File-System Objects
Visual Basic includes a bewildering assortment of objects that you can use to manipulate drives, directories, and files. The stream classes described in Chapter 37 enable you to read and write files, but they don't really capture any of the special structure of the file system.
A Visual Basic application has two main choices for working with the file system: Visual Basic methods and .NET Framework classes. This chapter describes these two approaches and the classes that they use. It finishes by describing some of the My namespace properties and methods that you can use to access file-system tools more easily. For more information on the My namespace, see the section "My" in Chapter 36, "Configuration and Resources," and Appendix S, "The My Namespace."
Permissions
An application cannot perform a task if the user running it doesn't have the appropriate permissions. Although this is true of any operation a program must perform, permission issues are particularly common when working with files, and the Windows Vista operating system is particularly strict about enforcing permission requirements.
A common mistake is for developers to build an application while logged in as a user who has a lot of privileges. Sometimes, developers even have system administrator privileges, so their programs can do pretty much anything on the computer. To ensure that users will have the permissions needed by an application, develop or at least test the code using an account ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.