n graphical user interfaces such as Microsoft Windows, drawing on the screen is an important task. Everything displayed on the screen is based on simple drawing operations. Often, environments such as Visual Basic abstract those drawing operations away from the developer. However, the same drawing operations still take place under
hen you make a method call on an object, typically you must block the client while the object executes the call, and control returns to the client only when the method completes execution and returns. However, there are quite a few cases where you want to call methods asynchronously?that is,
DI+ is a technology that developers generally associate with Windows Forms applications because they use it to draw anything on the screen from custom controls to diagrams. However, you can also use GDI+ in ASP.NET Web applications whenever you want to serve up dynamic images. You can use GDI+ to
here was a time, not too long ago, when browser-based user interfaces were considered both the status quo and the Next Great Thing. The demand for Windows Forms-based applications started to dwindle as the developer community fully embraced browser/server applications with their centralized server components and ubiquitous user interfaces. .NET,
ith over 45,000 topics, finding what you need in the Visual Studio .NET documentation can be a daunting task. The Doc Detective is here to help, utilizing his investigative skills to probe the depths of the documentation. Can’t find what you’re looking for? Just ask?if it’s in there, I’ll find
egular expressions. The name doesn’t conjure up any grandiose ideas about what they are all about. How could it with the word “regular” in the title? For those of you who struggled to learn how to use them, you’re probably thinking they should be renamed irregular expressions. How could something
eb Forms that require only controls and functionality provided by the built-in ASP.NET Web server controls are easy to create. But creating Web Forms that require or are designed with extended controls and functionality can be a challenge. In 2000, I worked on a client database in SQL Server that
asic error handling in SQL Server’s programming language, Transact-SQL, is straightforward. But when you nest calls to stored procedures, and the procedures have SQL transactions, error handling becomes much more complex. In this article I’ll show you some tried-and-true models for how to handle errors in nested stored procedures with
nderstanding the Java classpath and Java’s classloading mechanism are essential for any proficient Java developer. In a previous DevX article (Put an End to Jar File and Class Name Conflicts), I discussed how duplicate jar files and classes can cause hard-to-detect naming conflicts, which produce errors that are difficult to