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A few notes about CXPropertyPage (A class derived from CDialog). This window class is contained by one CXPropertySheet. The text of item from CXPropertySheet will have the text for the resource string with the same identifier as the dialog. The CXPropertyPage has one m_bAutoSize member with the following property: if this is set, the first […]

Environment:Win95/NT 4.0, UNICODE, VC++ 5.0, IE3.0, IE4.0, WinCE 2.0 and Windows CE Toolkit The DateTimeCtrl is implemented in the IE3 common controls (v 4.70). Those with MS Visual C++ 5.0 will have this installed and hence will have access to the control, but unfortunately not to a simple MFC wrapper for the control. This article […]

Environment: VC6.0 SP2 I saw Michael Taupitz’s idea of creating Links (shortcuts) and I realized that there are many times when we stumble across a link in command prompt mode and we have no idea what this .lnk file points to. Here’s a function I wrote which returns the Target and Arguments of a .lnk […]

Take a look at the following code. Can you see the problem? The code crashes and burns if the socket ‘socketFile’ is attached to has its terminating socket closed. If the MFC developers would have followed standard guidelines for exception handling, everything would be fine. RULE: Never throw exceptions from destructors. bool sendObject(CObject* pObj) { […]

MFC class framework makes possible to work easily with global variables and functions. Let’s declare a static member variable or function in the CWinApp derived class. It is accessible from all classes. Example: // MyApp.h class CMyApp : public CWinApp { public: CMyApp(); static int g_nMyVariable; // declaration static void g_MyFunction(); // declaration … etc […]

Microsoft KB article Q167733 points out that Visual C++’s implementation of operator new adopts non-FDIS compliant behavior in that it does not throw an exception in the case of an allocation failure. This may cause problems if not with your own code, then with third-party C++ code that becomes merged into your translation units. Third-party […]

This (very simple) dialog class, derived from CDialog, is meant to be used when you need to wake up a task at regular time intervals to do a specific job.  Why a dialog ?  Because it gives you some UI to specify parameters and also to start and stop the worker thread.  You’d use this […]

For the last few weeks I had been working on manipulating the Windows NT Services. Actually I was assigned a task to implement an already running server as a Windows NT Service. I had never done that sort of work before but when I started working on it, I found my self enjoying this one. […]

CPropertyPage version Download sample project and source files I wanted to give to my applications an accelerator editor as we can find in the VC++ (Menu Tools/Customize, Keyboard tab). Basically, the VC++ dialog allows the user to specify any accelerator for any available VC++ command. It checks the existence of overriden keys, handles locked accelerators, […]

Because of multithreading support is available, the MFC ODBC classes no longer use asynchronous processing. By default, drivers execute ODBC functions synchronously; that is, the application calls a function and the driver does not return control to the application until it has finished executing the function. However, some functions can be executed asynchronously; that is, […]

Environment: MSVC 5.0 The code was designed to build a dll to log trace statements to a text file at customer sites. At the end of the day the customers emails me the text log. To use the LogTrace.dll in your project add LogTrace.lib to the Object/Library modules in your linker settings and include the […]

Environment: any MSVC It’s very common that we have to test our program on another machine where the Visual C++ IDE is not installed. So there will be no debug window for output. Logging into a file or keep popping up MessageBoxs are not very practical ways. An easy solution is to show the output […]