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Environment: [VC6, MFC,  SP4, NT4/2000] Skill Level: Beginner, Intermediate   Introduction Not long ago, I was asked to implement a crosshair functionality in an OCX control that displays graphical data. Recalling that I saw something on CodeGuru, I found Paul Shaffers article ROP Codes, Rubber Bands, Clip Regions & Coordinate Transforms, which shows how to […]

The simplest way The main problem preventing us to drag an item from toolbar is that toolbar does not respond to drag action. Therefore, we should hand and send correspondent messages ourself. To do this, we need derive a new class CDragToolBar from CToolBar, then hand the LButtonDown event as following: void CDragToolBar::OnLButtonDown(UINT nFlags, CPoint […]

Environment: VC6 The problem… I develop several multi-project applications and have always had trouble keeping up with all my changes. Typically, I create several “release” builds while I am developing, so I can test as I go. Then I create a complete build of all modules for my clients. This is the only time I […]

Click this link for a Screen Shot. Environment: MSVC++6.0 SP3, Win98/2000/NT4(SP5) Code Description Purpose: This article features a HowTo to write, set and make use of system wide hooks. Implementation: To set system wide hooks, you need to reference a DLL in the SetWindowsHookEx()-command. The demonstrational workspace constists of two separate projects. One builds the […]

Environment: MSVC++6.0 SP3, Win98/2000/NT4(SP5) Code Description Purpose: DropTarget adds a “Drop target” (Drag&Drop client) functionality to your C++ code Implementation: [Any files you need to import in your project are shown in Red, any code to be added is shown in Blue] (1) Add the class definition files – DropFileArray.cpp / .h – MyDropTarget.cpp / […]

I wandered how I can simulate the Windows explorer listview of files. Here is what I found. It might be useful to someone. If you create a simple listview control and populate it with files/folders, you’ll notice that you can’t: Easily detect changes to files (rename, delete, copy/move…etc) while user is viewing the list Send […]

IDataObject,IEnumFORMATETC,IDropSource,IDropTarget,IDragSourceHelper,IDropTargetHelper Tools used: Microsoft. Platform SDK Whistler Beta 1 and VC++ 6.0 (SP5), WTL Platform used: Windows 2000 I tried to create as generic Drag and Drop classes as possible. Here is what I came up with. I think it’s a good starting point if you’re looking to add drag and drop support to your […]

Introduction Creating a Simple MMC Snap-In with ATL Adding About Information Adding the Items Adding Help Adding MessageView Adding Property pages Adding Menu Adding Wizard Adding Toolbar Adding Persistence Adding Connect to Server dialog Adding ActiveX control Adding Taskpads Adding WebPage Introduction This article tries to show how to implement basic MMC Snap-in features using […]

I had developed two control classes that would provide for the consistent entry and display of latitude and longitude values. Recently I developed a powerful abstract (pure virtual) class for a new category of edit controls I refer to as Multi-Field Edit Controls. That class, CGCMultiFieldEdit, has proven to be very popular. I have also […]

Environment: VC6, WMI SDK This week I gained a little experience of WMI using, so I would share it with you. The attached application is WMI client which can connect to WMI management servers and performs some activities: enumerating all instances of most populated CIMV2 classes, displaying their properties (only BSTR types), executing methods (for […]

Environment: VC6 SP4, NT4 SP6 This example demonstrates how to start a worker thread from a dialog, keeping the dialog free while running a busy loop in the background. The first of three loops is run from an OnButton event by declaring a variable and calling a function from CloopClass. This is to demonstrate that […]

Environment: Visual C++ 6.0, Windows NT 4.0 / Windows2000 Recently we had to do some printing on our IIS-Server. Printing on a physically existing printer was no problem. But after that we tried to print into files and send the files to the appropriate user. Printing to “FILE:”-port caused the spooler-service to ask for a […]