isual Basic developers had wanted inheritance for what seems like decades. The feature finally made it into VB.NET, making VB.NET an official object-oriented language. By now you are probably already
esides its email-processing function, the ubiquitous, open-source Procmail utility can be configured to serve as a local delivery agent for any mail transfer agent (MTA) such as Sendmail and Postfix
Sometimes, you want to handle an event such as a button click on the client first, and then post the click event to the server only under certain conditions. Here’s
ver the last few months, the blogosphere has been waging a battle for continued development and support for VB6. This battle reached its crescendo a few weeks before Microsoft’s schedule
am the host of “.NET Rocks”, an Internet audio talk show for .NET developers online at www.dotnetrocks.com and msdn.microsoft.com/dotnetrocks. My co-host Richard Campbell and I interview the movers and shakers
Default system tables and stored procedures are visible along with user-defined ones in MS SQL Enterprise Manager. This is fairly inconvenient when you’re trying to walk thorugh your own tables
Sometimes you need to resize an image according to the window’s size. You can do this by setting the image width and height as 100 percent inside the tag. IE
dmit it. You’re dying to know. How did the cross-country move, with four cats on a packed American Airlines Luxury Liner (if ever there was a misnomer, that’s it) go,
Consider a scenario where a dialog is launched from a panel which itself was launched by another panel. It’s very tedious to get the dialog disposed when the ESCAPE key
o you want to save keystrokes? Do you want to ease maintenance? Do you want inline information about the code structures that you’re working with? How about statement completion? Are
Assigning a data member with another member of the same class in the member intialization list results in this: class test{ public: test (int y) : j (y), i(j) {
n part 1of this article, you saw how to build your own instant messenger application that allows many users to chat simultaneously. While the application is interesting, it is not
he Calling Number Delivery (CND) service, commonly known as caller ID, allows phone users who have caller ID-compatible equipment to receive identification information about incoming calls, including the calling party’s
n a UML class model, classes are described by having attributes, operations, and relationships with other classes. When such a model is converted into code, both the public attributes and
attern gurus are quick to remind us that patterns are not code. Patterns exist at a level above the code. Or, as Martin Fowler says (PDF), “Patterns provide a mechanism
Sometimes you need to remove a link from an anchor tag dynamically. You can do this with JavaScript.Take a look at this example: Devx To remove the link (i.e, the
A common mistake many developers make is using their MySQL database to validate a user name and password combination. Here’s a typical SQL query checking for the existence of a
To achieve faster performance, enable the caching property in your database-driven data source control (this is applicable only for ASP.NET 2.0). CacheDuration indicates the number of seconds the data is
SAXParser’s DefaultHandler provides a callback for public void characters(public char[] ch, int start, int length, etc.) and throws a SAXException for reading element text contents. You can read the char
Application Verifier is a tool for testing user-mode applications for compatibility with MS Windows XP. It comes in handy when you’re troubleshooting issues like common programming mistakes related to memory
‘ll be honest. I’ve always been a sucker for voice-navigated applications. At the first startup I worked at, two of us were given Macintosh Quadras as development workstations, and we
any major product releases have a dizzyingly long list of new features and enhancements?often introduced atop a product that is in many cases so complex and feature-ridden that it’s already
ow can I add a fade transition when I load, or unload, external SWF movies? This question arises because, when loading a movie, the loaded content begins to appear as
tarting with SQL Server 2000, Microsoft added the concept of notification services to their flagship database engine. SQL Server Notification Services lets you generate and send notifications whenever some criterion
ne of the most common errors Java programmers make when they first learn multi-threaded programming is to misunderstand locks. They believe that locking an object prevents access to its fields
To include characters in your mask that are also part of the set of mask syntax characters, escape them by using the backslash () character in front of the character
Use this code to find information?such as the method name or the parameters?of a dynamic class: import java.lang.reflect.*;public class DynMethodNames{ public static void main(String a[]) { try{ //passing class name
StringBuilder has an Append method that returns a reference to itself. This is useful for when you want to append several items in one go. The following code is an
Everybody knows that the alert() function in JavaScript is used to display messages in a dialog box. For example, the following code: alert(‘Hello Prakash’); will pop up with this message:
I found this out trying to work around a problem with an object shared across threads (yes, it was bad programming, but I still had to work around it). By