CodeGuru Staff

Figure 1: Chat Server and Chat Client Environment: VC5 SP3, NT4 SP3 When one side of the TCP-IP connection goes down abruptly without notifying the other end, the other end is left hanging. This is especially important for a server handling hundreds of connections. For such a server, even a single hanging socket is tantamount […]

Environment: Visual C++ 6 Firstly, forgive me for my code. I have really tried my best to make is as easy to read as possible but DirectX is never the easiest thing to code. I originally wanted to write DirectX applications but found that every book I read relating to DirectX was coded using SDK […]

Environment: VC6, NT4 SP4 The is the search front-end to an access database for a travel agency. We came into the RichEdit class pretty naive as to how it worked. After much screaming, yelling, and E-Mailing. We finally got the thing to do what we wanted. The data entry app allows you to enter all […]

There are many ways to interface a database. Often programmers use the easiest method available to them, which can cause costly inefficient code. One mistake I often see, is the use of run-time built SQL strings that are passed to the database, which need to be parsed and interpreted, prior to returning a set of […]

Environment: VC6 SP2 There have already been several implementations of a multi-select tree control posted to CodeGuru, but none of them have provided the functionality and/or behaviour I required. The versions I have seen take the approach of handling the selection around the mouse-down, mouse-move and mouse-up messages, with variables holding state in-between. CMultiTree takes […]

CTreePropertySheet This class implements a generic tree property control (see picture above). Its features are: – Supports variable width tree control – Autosizing depending on the size of the dialogs contained – As this version is now based upon the CPropertySheet/ CPropertyPage model, all features of these are available. – Various styles(for example, like Netscape […]

Environment: VC6, WIN9x, NT4 Programming a modeless wizard has been a problem that I’ve been trying to solve for some time now. Since I’ve seen that many others have had difficulty with this as well, I finally decided to dive into the code and figure out how to do this once and for all. As […]

When I first got in touch with the Microsoft VC, it was boring to put a tab control in a form or in a dialog. I had to create the dialogs, fill in the TCITEM struct for each of my tabs, and finally insert them in the tab control. With the CXTabCtrl what you have […]

. Environment: VC6 SP2, NT4 SP5, CE 2.11 The Grid control is the best thing I found at Codeguru. Hats off to all those brains behind it! I have used the control for a few weeks now and I realised that it would be very handy to be able to use the grid in several […]

Have you ever written an application which asks the user to select a directory? Have you ever wanted to provide them a nice, neat way to do that without forcing them to manually type in the path? Well, now you can!! I have created two controls that provide you the bacic functionality to make a […]

This code snippet illustrates how to retrieve the column caption for any column of a listview. Basically this works by using the HDITEM structure and the listview’s associated CHeaderCtrl object. CString Caption; // will recieve the caption // retrieve the header control see "The header control" CHeaderCtrl* pHeader = (CHeaderCtrl*) m_listctrl.GetDlgItem(0); int nMaxHeaderLength=100, // or […]

Environment: VC6, NT4 SP3. After reading the article written by Robert Cremer , I realized that his version doesn’t correctly draw the blue selection rectangle around the selected item within the combo box. Therefore, I took a different tack in the designing of my version of a class that allows you to programmatically switch a […]