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Environment: Visual C++ 6.0 SP3 This DirTreeCtrl allows a user to display folders and Filenames(optional). The control uses the system image list for displaying the icons for the items in the DirTreeCtrl. You must not manage the Icon-Resources int the ImageList. The items sorted first by foldernames and then (if selected) by filenames. You can […]

There are two ways we can pass binary data in COM. SAFEARRAY and a pointer. by using a buffer pointer , we can get the best performance. Here is the method declared in server IDL: HRESULT Transfer([in] long cbSize, [in, size_is(cbSize)] unsigned char cBuffer[]) Here is the client code: ITargetObj * pITargeObj ; HRESULT hRC […]

Purpose Ok, A COM guru this will not make you. After all of this there is still a whole lot I don’t understand. Thank the Gods for bringing us wizards. I did have the impression it would be a lot easier than it really was. The code itself wasn’t hard. Finding the info was. It […]

Environment: VC6, NT4 SP3 Well, as you see the new Win2000 you may have wondered how to get those nice tool tips for menu bars in your own apps. Then you found the right place ! In my small demo application I implemented a very simple tooltip for menus which uses the status bar messages […]

There is a bug in ATL when creating a dialog resource with a combobox that contains string initialization data. The problem is the strings do not appear in the combobox at runtime, but work in dialog test mode. This problem does not appear with MFC, because MFC recognizes this as a problem and fixes it […]

Minimize-to-systray is a common UI idiom these days, but Windows doesn’t make this task easy. Another article here at CodeGuru by Dominik Filipp explains one way to implement this. That technique uses the “make your main window owned by an invisible window” trick, and also involves messing with the WS_EX_APPWINDOW style bit. This comes straight […]

When mastering a very big website, sometimes scoping the log for 404’s can be a tedious task. There might be some logreaders here and there that simplify this process. I chose to create a filtering DLL that logs only 404 not founds. In the general logfile the referer-URL is never inserted, which means you still […]

While recently working on a project, I needed to create a series of subdirectories from a user supplied string. These could be two, three, four or more deep. Of course the MSVC Help files lived up to their normal level of support. After beating my head aginst the wall I finally realized I could only […]

This is a combination of 3 projects built with Microsoft Visual C++ Ver 5.0. It was developed and run soley on Win NT 4.0 on a Corporate LAN. It has not been tested on other OS’s, or over a modem. The goal of these projects is two provide a knowledge base on Sockets programming. Project […]

Environment: Windows NT, COM In one of my projects I needed a delegation feature for COM mechanism. The server, running under high-privileged account needed to issue COM calls on behalf of low-privileged clients to another COM server. After searching in MSDN I have found that the current situation is pretty simple: “COM does not support […]

This CUniString is modeled on CString to manipulate UNICODE string. It is very convenient to manipulate UNICODE string. If you want to do something with UNICODE string on Window 95/98(not Window NT), it can help you. Just add “UniString.h” and “UniString.cpp” to your project. Examples: CString sCString;   // CString variable CUniString sUniString; // CUniString variable […]

Environment: VC6 SP3, Windows 95/98/NT/2000 The class CFormulaParser encapsulates a very useful mathematical parser for analytic/numerical formula transformation. The formula dialog above is actually not necessary for the functionality but allows you comfortable to put in a formula string. Hereby an extract from the header file: class CFormulaParser { private: //Implementation CString m_strFormula; CString m_strFunction; […]