CodeGuru Staff

Environment: VC6 SP3, NT4 SP5 The first thing you should do before you attempt to use a RAS function, is find out it the RAS is actually installed. According to the Microsoft Knowledgebase (article Q181518) can detect wether the RAS has been installed by trying to LoadLibrary(“rasapi32.dll”). I have noticed that on almost all 9x […]

#define MAX 1000000 CGBitArray gba(MAX); for (int i = 2; i < MAX / 2; i++) for (int j = 2 * i; j < MAX; j += i) gba.SetBit(j); for (i = 1; i < MAX; i++) if (!gba.GetBit(i)) printf("%d is primen", i); And here’s the actual class: class CGBitArray { public: void Init(int […]

Environment: Win9x, VC6 SP4 I need a software control to simulate and replace a hardware dial control. So I came up with this control. This radial control is derived from CStatic and can be created using the ClassWizard or you can do your own subclassing. Most of the commands are similar to CSliderCtrl, I may […]

Active Comment is an add-in to Microsoft Developer Studio. It has been tested with Version VC++ 6 and Service Pack 3. This addin provides active comments using your source code. You can reference your code with external files, e-mail addresses, set links to internet sites, MSDN articles, or you can insert voice commentary to your […]

Looking around for some nice bitmap hoverbuttons, I just couldn’t find what I was looking for. In this case there are a couple of things you can do: Leave it. Buy it. Steal it. Get it for free. Start crying Do it yourself (and possibly share it.) I’ll share! I found another hoverbutton class that […]

. Overview This code provides two global functions, WriteVariantToStream and ReadVariantFromStream, that enable you to read and write a variant to a stream. In addition, there are two other global functions, ReadVariantFromBlob and WriteVariantToBlob, for reading and writing a variant to a BLOB. Highlights Here are some of the main advantages of these functions: Uses […]

I have looked at some of the other function comment macros and unfortunately, in my opinion, each one was lacking in some important area. Here are some of the features that I needed that I found missing in the other macros: return pointer type with spaces befor “*”; templates in function parameters undefined return split […]

BOOL CWinChannelView::RenderToJpeg(LPTSTR szFile, int quality) { // Opening the file CFile file; if (!file.Open(szFile,CFile::modeWrite | CFile::modeCreate)) return FALSE; // Get client geometry CRect rect; GetClientRect(&rect); CSize size(rect.Width(),rect.Height()); // getting device context CDC *pDC=GetDC(); // Alloc pixel bytes int NbBytes = 3 * size.cx * size.cy; unsigned char *pPixelData = new unsigned char[NbBytes]; unsigned char *pPixelData2 […]

Figure 1: Visual InterDev 6 Option Dialog Overview Many of Microsoft’s development products are beginning to go away from the tabbed dialog metaphor and have started using a single dialog with a treeview control that is used to display application options in a hierarchical fashion. Figure 1 (above) shows the Options dialog in Visual InterDev […]

Environment: VC6 , NT4 SP4+, W2K Pfwredun.exe ( Hot redundancy agent ) is the program which shows the possibility of catching IP address of master PC ( say ‘A’ ) , which shuts down or fails , by slave PC ( say ‘B’ ) and from that moment client apps on others PCs see this […]

Environment: Any flavor of C++ Introduction In this article I am going to present to you a better way to create and delete linked lists. The idea involves using double pointers. This approach will make you use less code, which makes it more efficient, more easily understood (if you are comfortable using double pointers). I […]

Environment: Visual Studio and C# Here are the instructions necessary to have Visual Studio syntax-highlight your C# files. Locate the following key in your registry (using regedit or any other registry editor): HKEY_CURRENT_USER\Software\Microsoft\DevStudio\6.0\Text Editor\Tabs/Language Settings\C/C++\FileExtensions This value will contain a value like the following: cpp;cxx;c;h;hxx;hpp;inl;tlh;tli;rc;rc2 Simply add the .cs extension to the end as in […]