getlasterror

I. INTRODUCTIONMany people complain that mongodb is a memory database and has no transactions and may be insecure. In fact, this is a misunderstanding of Mongodb. Mongodb has a complete redolog, binlog, and persistence mechanism, do not worry too

MongoDB 3.0 Security Permission access controlMongoDB 3.0 access control has changed a lot, you need to pay attention to this parameter authenticationmechanisms. To use the 2.6 version, I directly specify the following

When compiling applications in VC, it is often necessary to handle errors. Many function calls only use True or false to indicate the function running result. Once an error occurs, msdn often points out that you should use the getlasterror ()

VC GetLastError () get the use of error informationWhen you write an application in VC, you often need to deal with error handling issues. Many function calls use only true and false to indicate the result of a function's operation. In the event of

Errors may inevitably occur during Win32 programming. The biggest headache is that you don't know where the error is and why it is wrong. Microsoft also thinks about this. Therefore, it provides a good function getlasterror (), this function returns

Introduction to the getlasterror () function This is a very simple function. Its function is to obtain the error code generated during the previous function operation.Through the error code, you can find the meaning of each error code in the

Resolve Unable to load R3 module ... VBoxDD.dll (VBOXDD): getlasterror=1790Reference article:

This is really strange. It is clear that createmediawex has failed, but it is followed by getlasterror but returns 0 to say it is successful. Fuck Widnows! In fact, the window fails to be created because the registered window handler does not

1 voidCstockserverdlg::errorexit (LPTSTR lpszfunction)//Error function2 {3 //Retrieve The system error message for the Last-error code4 5 lpvoid lpMsgBuf;6 lpvoid lpdisplaybuf;7DWORD DW =GetLastError ();8 9 FormatMessage

Many Windows API functions do not return values to express error messages. Instead, they allow callers to Use API getlasterror () to obtain error codes.   When debugging the program, we can see that the API function call failed. We want to see the

Reason for dynamic load DLL failure using LoadLibrary (): Path Error (program is placed in the same directory as DLL) DLL itself error (dependent on other DLLs) Workaround: Put the DLL and EXE in the same directory

YesterdayCodeThere is always a problem during running, because Ace (Adaptive Communication Environment) library is used, and macro (macro) is used in many places, which is inconvenient for debugging. In fact, I only want to know the value of

Error handling, displaying the reason void __fastcall TSerialPort::ProcessErrorMessage(char* ErrorText) { char ErrorMsg[400]; LPVOID lpMsgBuf; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER| //自动分配消息缓冲区 FORMAT_MESSAGE_FROM_SYSTEM, //从系统获取信息

We usually use GetLastError to get the error message after calling some APIs, but the information is integer, do we know what it means?Hey, yes, there is MSDN Ah, of course, you can also use the FormatMessage function.Just looked at the Windows core

Recently, the school curriculum design was written in the C ++ factory model. C ++ does not automatically throw an exception. Therefore, only one hresult (typedef long hresult) can be returned after many items are judged. If the hresult is 0, it is

A strange problem encountered when debugging a program: a very simple Win32 DLL is a dllmain, which contains several lines of code that call the API function at process attach to obtain the specified key value of the registry, which is very simple.

// Makecert. cpp: defines the entry point for the console application.// # Include "stdafx. H"# Include DWORD makecert ();Void log (char * error_msg, int error_num ); Int _ tmain (INT argc, _ tchar * argv []){Int T;If (t = makecert ()! = 0)Printf ("

Getlasterror command When writing data to a database, MongoDB does not wait for a response message by default. Use the getlasterror command to ensure that the operation has been correctly executed. In many drivers, the getlasterror command is

I recently read the Windows Access Control Model on msdn. Access control is"Use appropriate resources right persons use right resources." So, Step 1: Verify the Operating SystemAuthenticationTo verify whether the user identity is declared by the

Associating processes and ports is a very useful function. You can clearly know which programs are using which ports are helpful for trojan detection and removal. However, although we can use the task manager to browse the process list and use