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The Latest

DevX

How to Make a Swing Component Appear and Disappear

Here’s a very short bit of code that will make a StatusBar hide or show, accordingly: public void viewStatusBar() { /* Hide or show the statusbar */ StatusBarPane().setVisible(!(StatusBarPane().isVisible()));} Just have

DevX

Encapsulate Member Objects

Objects frequently contain member objects that need to be exposed.Often, these are not correctly encapsulated, which could lead to problems that are difficult to track down.Consider a Circus object, which

DevX

Communicating With XML Files

Start a new VB project. Add a form (or use the default one). Then, add these four buttons on the form: create (cmdCreateFile), read (cmdRead), append (cmdAppend), and delete (cmdDelete).

DevX

Avoid Hungarian Notation in Public Interfaces

Most coding standards recommend the use of Hungarian variable naming, which uses prefixes to indicate the variable’s type. However, these naming conventions usually should not be used in a component’s

DevX

Getting MAPI entryID’s From Outlook Folders

This tip is useful if you do Outlook automation with user created Outlook folders. These folders cannot be accessed by the GetDefaultFolder method usually employed in automation techniques. This snippet

DevX

HTML Doc Add-in

This handy add-in creates code headers in VB source and HTML documentation for VB projects. When you run HTML Doc the first time, it will create all these headers with

DevX

Create Your Own VB Add-Ins

Why should you createAdd-Ins? We programmers always feel that we are short of several features whileworking with Microsoft tools, it seems that Microsoft hasn’t yet developed thetool we needed. In

DevX

Use Refresh, not DoEvents

The DoEvent statement should be used only to give other portions of your program to be reactive to the end user’s actions. Instead, many VB developers use it to force

DevX

Delete a folder and all its subfolders

The RmDir command can delete a directory only if it doesn’t contain files or sub-directories. If the directory you want to delete does contain other files or, worse, subdirectories it

DevX

Swap strings the fast way

Consider the usual way of swapping two strings: Dim s1 As String, s2 As StringDim tmp As String’ initialize the strings s1 = String$(1000, “-“)s2 = String$(1500, “+”)’ do the

DevX

Serializing and Deserializing Arrays

Suppose you want to store the movements of a chess game in a file so that when the program terminates, the users can resume it later from the same point.

DevX

What Is a Thunk?

The term thunk dates back to the days of the antediluvian Algol programming language and has stuck since then. A thunk is an invisible and parameter-less function or procedure that

DevX

DLLs and Dynamic Memory Allocation

Dynamic linking — either in the form of shared libraries in Unix or Windows DLLs — is not defined by standard C++. However, this is a widely used feature among

DevX

Obtain Exception’s Stack Trace as String

It is sometimes necessary to get the exception’s stack trace as String (for logging, reporting, etc.). Unfortunately, the Exception class itself provides only the getMessage() method which does not include

DevX

Variadic Macros

The concept of a variable argument list is rather common: void f(const char *format,

DevX

Provide

It is often helpful to provide a

DevX

Passing a UDT(User-Defined Type) Between Forms

There is a very simple way to get around the compile error when passing UDT (user-defined type) in procedure between forms. Just declare the procedure as Friend instead of Public.Example:

DevX

Resize the Column Headers to Fit the ListView

This function resizes the column headers to fit the ListView. It can be used in the Form_Resize event or just in Form_Load. ‘Module: Module1Option ExplicitPrivate Type RECT Left As Long

DevX

Get Started with JBoss Application Server

he JBoss Application Server is an open-source EJB solution that deserves your attention. Why? Because not only does the JBoss server have some impressive features that Weblogic, WebSphere, and the

DevX

Essential JavaScript: 8 Cross-Browser Solutions

here’s a core set of problems that every JavaScript developer will run across sooner or later. In my Web Developer classes, I’ve noticed that some questions arise repeatedly—they’re common problems.

DevX

Not Much to ‘C’ in C#

# is getting a lot of attention these days?so much attention that some DevX readers have begun to remonstrate on what they consider excessive coverage, especially for a language that