CodeGuru Staff

Environment: Visual C++ (SP3), Windows NT4 (SP3) The Problem: Call a function in a DLL passing some arguments. The DLL, function and arguments are not known until run-time. The argument types are limited to standard types (i.e. char, short, long, float, char*) but not, for the sake of simplicity, doubles (due to their 8 bytes). […]

Here are two template classes and one normal class designed to prevent memory leaks. CMyList (template) This class is a wrapper for the CList MFC template class. It adds extra functionality and allows its member items to serialise themselves (important for schema versioning). CMyTypedPtrList (template) my personal favourate This class is a wrapper for the […]

This is another COleDateTime and COleDateTimeSpan replacement class.  However, it differs in two ways: it isn’t dependent on MFC, and instead of using one class for date/time and another for date/time span, it unites the code into one class called TimeStamp. Like Chris Sells’ replacement, it was also started from the MFC version, and uses […]

In this article, I give a wrap class which encapsulate the OpenGL 3D Font functions. With this class, you can design any 3D letter as a 3D geometry object, translating, scaling, rotating, texture mapping, etc. The key steps to display a 3D letter is: 1) Create a display list 2) Create and set a font […]

and enhanced by Guy Brousseau and Greg Gagnaux. This class, CTooolTipWnd is useful if you want tooltips to look like an ellipse rather than the standard rectangle as shown in the image below. Usage is somewhat similar to MFC CToolTipCtrl. To use CTooolTipWnd in an MFC application, you have to perform the following steps 1. […]

CProgressWnd provides a full-featured window for showing the progress of an operation. It supports a progress bar with a configurable edge style and fill colour, a message to let the user know what is happening, an optional cancel mechanism and an optional animation in the form of an AVI. The window automatically sizes itself to […]

Environment: VC6 SP2, NT4, Win95 This class allows you to create a scrollable list of buttons. It is derived from Chris Maunder’s excellent Grid Control which appears here on the CodeGuru site. Note that users of this control are bound by Chris’ copyright requirements detailed on his web page. My application has a feature which […]

Description Of Class CTitledPicsWnd CTitledPicsWnd provides a large-icon-list-view-style window class with scrolling capabilities, but instead of just icons it can display bitmaps with titles below. The size of the ‘section’ that each bitmap occupies can be set specifically, or can be left to find the best fit. ‘Best fit’ means that the largest bitmap’s width […]

This class provides a window which supports an image, or a piece of text, or both, and which can be clicked. The window provides feedback as you move the mouse over it. Clicking the window acts like double-clicking a file in Windows Explorer, in that it will open the specified document or folder, or run […]

Environment: VC6 SP4, NT4 SP3, Win98 MFC’s CDialog class is a powerful and flexible class but it has its shortcomings. If we wish to allow the user to resize the dialog and still retain access to all controls within the dialog, then we must either resize/displace the controls within the dialog, or implement any scrolling […]

Environment: Oracle8, VC6, NT4, WIN95/98 Osql.exe is an SQL client that runs on Windows NT/95/98 with Oracle Net8. It is built using the COdb class which requires Oracle8 and can be added to any MFC project. This OCI wrapper class is in a single convenient .cpp/.h pair. The Osql project is in Visual C++ 6.0, […]

I was amazed and delighted to see how simple database access has become thanks to OLE DB. I’ve been reading the hype and so I went out and found the Microsoft Book on OLE DB. It’s a great idea as it’s explained there but still rather complex to code. I noticed that Visual C++ 6 […]