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. Warning: The class presented in this article uses the undocumented MFC member function CCmdUI::DoUpdate Example project with dialog using this technique You will have used the ON_UPDATE_COMMAND_UI macro in MFC with your various menu commands. This macros is used to implement the message handler for the UPDATE_COMMAND_UI "message" sent by the MFC framework. This […]

afxpriv.h has a message, WM_KICKIDLE, that is sent during idle processing. To get dialogs to work with the ON_UPDATE_COMMAND_UI message maps, you need to trap the kick idle message and call UpdateDialogControls. In a dalog class header, add the following in the message map: afx_msg LRESULT OnKickIdle(WPARAM , LPARAM ); In the implementation file: #include […]

The SAFEARRAY is a standard way to pass arrays or collections between COM objects. Using COM’s standard marshaller , we can pass a collection of OLE Automation compatible data types using SAFEARRAYs. Multidimensional SAFARRAYs help us pass various automation compatible data types through the same array Assume , we own an icecream parlor and would […]

When I wrote my first DirectX program, I didn’t want to leave out the advantages of MFC. So I was looking for a demo project which used both – DirectX and MFC. Finally I have found one and I have modified it. This project is suitable for games, but not only for them . The […]

This article was written to help the programmer put a modeless child dialog "into" another dialog and maintain the proper tab order for the new combination.   Normally when a modeless child dialog is created and placed in a parent dialog, the tab order follows the parent dialog. This is illustrated in the in the […]

Environment: Tested on NT 4.0 SP3, VC6.0 Putting the MRU list in a submenu might appear just a matter to move the menu item ID_FILE_MRU_FILE1 from the ‘File’ menu to a submenu. Unfortunately a bug (of the CRecentFileList class I read but I believe that it’s elsewhere in the framework) makes the things more complicated. […]

The following contains a method for putting MRU’s on a separate submenu. After studying Todd C. Gleason’s method for implementing MRU’s on a submenu MRU’s, I ended up taking a slightly different approach. Namely, a helper function to handle the application’s OnUpdateFileMruFile1(CCmdUI* pCmdUI) function. CRecentFileList::UpdateMenu() seems to work OK if there’s another item on the […]

RNSO is a server where the well known Observer Design Pattern is implemented with Distributed COM. The Observer Design Pattern helps you to build applications when a change on a data need to be notified to another of your app. The Datas are called Subjects, and parts of applications interrested by the changes is (are) […]

OVERVIEW: COM is a great tool when programming in windows. It gives us the ability to communicate with other programs and allows us to scale our products.  There are a few things we are are used to doing however, that are more difficult with COM, one of these is passing arrays as parameters in COM […]

Description: The SoundIn class provide a set of functions to interface a sound card for input signal. The CSoundIn::OpenMic() function is the main start procedure. It initialise all the parametres or the sound card, create an EVENT object and start the sound thread. The thread procedure is used to signal to the sound class that […]

Introduction: This simple class is for people who want to make their application more attractive using icon animation in the title bar of frame window. Technique: All the consecutive images used for animation are stored in a single bitmap resource. The animation could have been achieved also by storing each image as separate icon in […]

Here is a class CTabFrm that implements an MDI Frame (CMDIChildWnd) that holds Up to 150 views. You don’t need to modify your views,just use this MDI frame with tab support. You organize views in groups (up to 10 groups) Each group can Hold up to 15 views. You Can Select (Replace) a View using […]