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We often encounter this problem, how to use the MySQL database in a non-web program or ASP program? There are two solutions to this problem: 1. Use the Library of API functions provided by MySQL. This is how many well-known MySQL client tools are implemented, as is the famous Winmysql tool. This can be achieved in most development tools. such as VC,BCB,DELPHI,VB and so on, as long as can call the third party API can be achieved. But it is not easy

Running Setup.exe setup will pop up the following program Compatibility Assistant prompt: There is a known compatibility issue with this program, WIN7 is warning users vc++6.0 compatibility issues: There are known compatibility issues with this program. The following figure, select no longer show this message, click "Run Program", and then encounter the "this program has known compatibility issues" prompt, also follow this procedure! Oper

"refactoring" functionality later on (The VS2012 integrated development Environment I use today supports personal feeling that is already very good), even for longer sub-functions as much as possible, so as to minimize the above problem! (Sometimes, the individual is a bit proud, in the longer function inside the modification will not use "refactoring"!) This is the cause of the above bug. ）　　The second conclusion is: When the system is running wrong , use the call stack a lot. Today's call sta

It is necessary to introduce the debugging and viewing methods of the library files before entering into the detailed elaboration of various kinds of DLLs, because we will face a large number of examples from the next section. Because the library file cannot be executed separately, it pops up the dialog shown in Figure 3 when F5 (Start debug mode execution) or CTRL+F5 (run) executes, requiring the user to enter the path of the executable file to start the execution of the library function. This

written by VC + + to be written in other languages of the program calls, the function should be declared as a __stdcall way, WINAPI All in this way, while the C + + default invocation method is __cdecl. The __stdcall method differs from the __cdecl in the way that the function name ultimately generates the symbol. In the case of C compilation (in C + + to declare a function as extern "C"), the __stdcall calling convention underlines the output functi

This article mainly introduces the following clipboard operations in VC++/MFC: 1, the text content of the operation 2. Operation of WMF data 3, the bitmap operation 4. Set Use custom format 5, the perception of clipboard content changes 6. Automatically paste data into another application window I. Operation of text content The following code demonstrates how to copy text content to the Clipboard (Unicode encoding is first converted to ASCII):

Objective In this paper, the Java Runtime interface is used to realize the application of other languages, and then to monitor and control the computer hardware information. This paper is a part of the multimedia information system, which is to adjust the volume of the computer. Use VC to write volume control program This control example is written using VC6.0, primarily by invoking the system's APIs to implement the Mixergetlineinfo gets Master V

Library releases the memory and resources allocated in the CPL_INIT message. Finally, the control Panel unloads each CPL library and exits. ----The above is described in the Control Panel components of the working principle, where the specific parameters of the message definition please refer to the win-the SDK. Using VC + + to write Control Panel components----Writing Control Panel components is actually writing a DLL, with Visual C + + this power

), NULL);SendMessage (hwnd, Lvm_getitemtext, (WPARAM) IItem, (LPARAM) plvitem);ReadProcessMemory (hprocess, Pitem, Itembuf, MB, NULL);Compare strings and change Test.exe to your process image nameCString str = (CString) itembuf;if (Str.comparenocase (_t ("Test.exe") = = = 0){HWND Hwnd=findwindow (null,_t ("Windows Task Manager"));SendMessage (hwnd,wm_destroy,0,0);Sleep (10);MessageBox (null,_t ("Disable shutting down the system critical process!") "), _t (" hint "), Mb_iconerror | MB_OK);}}}}}Fr

redraw immediately. The window does not redraw immediately after calling functions such as invalidate, because the WM_PAINT message has a low priority, and it needs to be processed after other messages in the message queue have been sent out. Calling the UpdateWindow function causes the WM_PAINT to be sent directly to the target window, causing the window to be redrawn immediately.Hope to be useful to those in need .... For reference only!! There is something wrong, please give a bit in the com

MiniMFC f does not implement the code. Let's change the function definition in the. cpp file to the following:void f(){ cout"I‘m MiniMFC::f() from DLL" And then recompile, using Dependency Walker, you can see that this DLL does export a f function named, but it is global, not in the Minimfc namespace. [Email Protected]@@[email protected]@@z[email protected]@[email protected] @QAEXXZ[email protected] @YAXXZ 3 SolutionsKnowing the reason, solving it is very simple, only need to u

then get the view based on CMainFrame:Pmain->getactivedocument (); Note Type conversionsGet Documentation:Obtain the CMainFrame first, and then obtain the document according to CMainFrame:Pmain->getactivedocument (); Note Type conversionsV. Other classes in the programRefer to the above method, where the app can be obtained by AfxGetApp, CMainFrame can be obtained by AfxGetMainWnd, anywhere, doc and view are the two structures that belong to CMainFrame, can be obtained by CMainFrame."

When you select a file or folder in Explorer window, and choose ' properties ' From the menu, you get the Properties window that contains some essential information about the file: the size of file, created date, modified date, attributes, and so on . It's possible to display this properties window programmatically, by using the shellexecuteex API function. the function below accept 2 parameters, and displays the Properties window of the file: hwnd -The handle of the window that call

. The definition of a class takes up a certain amount of storage space, and the class definition method and class name are stored together. When a specific object is produced, the Face object language system allocates storage space for this object, which mainly stores the name and data member of the object; The static characteristics of an object are unique to each object, but the dynamic feature is public for all objects of a certain type. The biggest difference between an interface and a class

point completionClick the list control and draw a range in the dialog to draw the list controlRight-click List control, point propertiesIn general, modify the control ID, you can name it yourselfSelect report mode in the Style tab, other defaultPress CTRL+W, Call out Class wizard, choose Ctestdlg, this is the name of the construction project, own name, may not be the same as me, choose member variable tagClick Idc_list_info, also named by yourself, may not be the same as mine, add VariableI hav

book classBook::book (Char*name,LongPageCount) {Name=New Char[Strlen (name) +1]; strcpy (name, name); PageCount=PageCount;}//---------------------------------------------------Two. member override issues derived from class derivationIn inheritance, a derived class contains all the base class members and joins its own new members, so derived classes can access any member of the base class based on the member access mechanism at the time of derivation (unless those members are redefined in the

Visual Studio 2010 is Unicode by default, and projects that are compiled successfully in VC 6.0 often have type errors in VS2010. The common error is that you cannot convert from const char * to LPCWSTR, such as using CreateDC ("display", null,null,null), if you use CAST (LPCWSTR) "Display", though you can pass, But the encoding will go wrong. The possible way is to use text ("display") to convert, CreateDC (text ("Display"), null,null,null); Another

("str1"); Char str2[] = "str2"; WCHAR str3[] = L ("STR3"); The first line of code is equivalent to the third line of code when Unicode is defined, and none equals the second row.But the first two lines of code, whether or not Unicode is defined, generate an ANSI string, and the third line of code always generates a Unicode string.For the portability of the program, it is recommended to use the first presentation method.In some cases, however, if a character must be ANSI or

object;. For example, declaring an object of a clock class: Clockmyclock;. When you declare an object, you can access the public members of the object, which requires the use of "." operator, the general form of calling a public member function is the object name. Public member function name (parameter table), access public data member in the form of object name. Public data member. Of course, the general data is private, but it does not exclude the public type at times. For example, the member

Chinese is GB2312, which mistakenly considers the printf output UTF-8 string to be GB2312, causing garbled characters.3.2 Best SolutionIf there are no non-ASCII characters in the string constants, it is recommended that the source file use unsigned UTF-8 encoding to support the earlier compilers.If the string constants contain non-ASCII characters, it is recommended that the source file use a signed UTF-8 encoding, which will enable most compilers to correctly handle the source character set.Su