CodeGuru Staff

In the previous article, you learned how to perform validations using CompareValidator, CustomValidator and RangeValidator provided with the .NET Framework. In this second part, I will examine the applications of remaining three controls namely RegularExpressionValidator, RequiredFieldValidator and ValidationSummary. While the ValidationSummary control summarizes all the errors occurred, the remaining two controls are used in different […]

Environment: VC++/ATL COM Introduction After having written about developing Office COM addins in an earlier article, I get a lot of mail from people trying to write Word addins. Through this article we will discuss common development issues regarding Word addins in general. First, we learn how to build a simple WORD 2000 ATL COM […]

Environment: VC6 This is a simple, dialog-based application that allows a user to shut down a remote or local machine, using any domain or local account that has remote shut-down privileges. The downloadable code demonstrates how to create a thread that uses different account rights as the parent process. Downloads Download demo project – 20 […]

. Environment: ASP, .NET Introduction Recently, I was working on my Web site and I wanted to implement a guestbook. So, I searched the Web to get the best guestbook for my Web site. But then I thought, “Hey, I am a developer. Why not create my own?” It was very easy to create a […]

Click here for a larger image. Environment: ASP .NET, ASP Introduction This article describes a simple function that gets the duration time call of your ASP scripts. It’s very useful to find the time elapsed between two points in your ASP scripts (for example, a DB calls script). How to Use the Program First, you […]

Environment: Win 9X, 2K, XP The attached code demonstrates a technique you can use to create multiline balloon ToolTips for ListView column headers. The code uses a subclassing technique to trap the WM_MOUSEMOVE event of the Header control that is a constituent part of the ListView control. The handler for this event determines the index […]

Environment: Win32 (Packet manipulations work only on 2000/XP), VC 6.0 (all samples come with complete source code) This library enumerates the TCP/IP protocol, and allows the user to create custom TCP/IP headers. It is also now used for regular network communication (when you don’t want to use MFC in your projects). Features in version 4.0 […]

Environment: VC6, Windows, PLC Overview Modern automation of industrial plants use networking. Specialized networks, called fieldbus, have been in use for many years and in many flavours. Modbus, the most successful, recently found its way to CodeGuru—see MODBUS Serial RTU Simulator by Conrad Braam. Over the last years serial Modbus communication over RS-232 or RS-485 […]

Environment: VC++6, Win32 Overview This article demonstrates a simple technique for capturing which 3D object the user clicked on with the mouse. Of course, it can be used to discover the object at any X,Y position on the screen. The most difficult thing about picking is telling OpenGL to send its output directly to an […]

Click here for a larger image. Environment: MFC/C++, Internet & Network, HTTP/HTTPS This article presents a utility that lets you retrieve raw information from Web servers by using HTTP’s GET and POST commands. Description This utility is just a wrapper around reusable functions that allow programmatic access to the Web through a sort of ‘mini-browser’ […]

Environment: MFC, Visual C++ 6.0, Windows 2000 The following code fragment shows how to read an image from a BMP file and display it in your MFC application window. You could see several articles on the same focus; the one I present here is very simple, with just a few lines of code. The code […]

Environment: VC++6, Win32 Overview Rendering an image on the surface of an object can be accomplished with just a few steps by using OpenGL. My last article on OpenGL demonstrated a simple method for drawing OpenGL output directly to a device independent bitmap (DIB), and for loading OpenGL commands into a call list to make […]