CodeGuru Staff

Environment: VC6 SP4, VC.NET Introduction Okay. I would like to start with a little explanation of digital sound and its archiving in computers. A long, long time ago, audio signals, like others, were processed and archived in continuous form. They were so-called analogous signals. This type of signals has a lot of advantages; one of […]

Environment: ATL Implementing a DropTarget in ATL Making a control a drop-target in ATL is not something you do very easily. The only help I found in MSDN was an example that didn’t work (surprise) until I changed the datatypes of two parameters, as though they did it on purpose. That frustration out of the […]

Last time we talked about a custom TextBox control that incorporates a regular expression and validates against that expression. Small, incremental changes like this are invaluable as an accumulative means of growing a reliable toolbox. Unfortunately it is not always convenient or easy to create a test application to test your controls. In the case […]

Environment: VC6 SP5/VC7, Windows 2000/XP Do you have an application where, for some reason or other, you must pick users from either an old-style NT domain, or a new-fangled Active Directory? I was recently in that situation. What I wanted was very simple: I wanted to show the system dialog “Select Users or Groups” from […]

Environment: Visual Studio 6 with latest service pack, Visual Studio .NET What Is Matrix? Matrix is a templatised utility class with many uses. One of it best features is it takes away the complexity of creating COM arrays (SAFEARRAYS). Matrix was initially designed as a 2D array helper class. It later became far more useful […]

Environment: VS 6.0, VS.NET, eVC 3.0, Java 2 SE Introduction When your application consists of more than one process, you face the question of optimizing communications between the processes. Such distributed applications include computational grids, peer-to-peer networks, client/server, and three-tier business applications. They all use different ways of sending information to other processes and receiving […]

Environment: .NET In my last article, I presented formatting specifiers for dates and times. Format specifiers are most often used with numbers. For example, to print a decimal number to three levels of precision, you would use D3 as the specifer. The following uses this specifier within WriteLine: System.Console.WriteLine(“A Number: {0:D3}”, dVar); While numeric specifiers […]

Environment: UML 1. Introduction The immense growth of the World Wide Web in the past decade has ushered in an era in which the development of the Semantic Web is the key to harness the plethora of information available into tangible knowledge. Tim Berners-Lee1 envisioned the idea of the Semantic Web in which automated agents […]

Environment: Visual C++ 6.0, MSXML 2.0 Many applications that use dialogs and form views would be more effective if they allowed a user to customize their screen GUI layout. This article describes a solution that would give developers a possibility to make their applications customizable by users. The proposed library, XMLGUI, is a tool for […]

Environment: VC6, Win32 Introduction Seemingly, every application I create has some lengthy processing in the WM_CREATE section of code. Sometimes, this delay before my main window is displayed causes users to click again on the application icon, thus starting yet another instance of the application. This SPLASH C++ class allows me to easily display a […]

Making controls dynamically reposition, resize, and align in accordance with the Form size. . Environment:VB6 Ever designed a Form with List or TreeView controls that looked okay, but turned out to be OTT if there wasn’t much data to be displayed, or felt cramped if there was plenty to be displayed? Thought about making the […]

     Environment: VC6 SP4, Win 2000 SP2 Owner-Drawn push buttons have been well covered until now, but what about check boxes? At first I was surprised that, although being one of the basic controls under Windows, I couldn’t find anything useful about customized check boxes. I soon realised why: Windows doesn’t support Owner-Drawn check boxes. […]