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CreateFileMapping How to use

CreateFileMapping's MSDN translation and usage experienceTesting the creation and opening of the file map always get the "Invalid handle" error, after careful look at MSDN only to realize that the function is not understood, here to translate the

C # Call an API to send data to an external program

C # Call an API to send data to an external program A project may be created recently. The project has such A function. After calling program B in program A and logging on to program, to automatically fill in the login name and password of program A

Simple example of using redis in PHP

This article mainly introduces a simple example of using apsaradb for redis in PHP. it mainly shows you how to use apsaradb for redis in php. The example is very simple. it is explained in the annotations, so there is not much nonsense here. The

C # call API to send data to external programs

C # call API to send data to external programsIt is possible to do a project recently. In the project has such a function, in a program to invoke the B program, while in a program login, a program to the login name and password to automatically fill

WinExec, ShellExecute and CreateProcess and the way of judging return values [go]

There are three API functions that can run executable files winexec, ShellExecute, and CreateProcess. CreateProcess is less used because it is more complex to use.  WinExec mainly run EXE files.⑴ function prototype: UINT Win Exec (LPCSTR lpcmdline,

Regsvr32 usage and Error Message description

You can use Regsvr32 tool (Regsvr32.exe) for self-registered object links and embedded (OLE) controls, such as dynamic link library (DLL) files or ActiveX Control (OCX) files) to register and cancel registration. Regsvr32.exe usage RegSvr32.exe has

One of windows disk operations-Basic Concepts

Recently, I had to deal with disks in windows. It took me a week to understand some basic concepts, record them here, and take some code in the project as an example.First of all, this document does not use the cmd command line for the following

C++builder CryptoAPI MD5

#include DWORD Gethash (CONST BYTE*pbdata, DWORD Dwdatalen, alg_id algid, LPTSTR Pszhash) {DWORD Dwreturn=0; Hcryptprov Hprov; if( ! CryptAcquireContext (&Hprov, NULL, NULL, Prov_rsa_full, Crypt_verifycontext)) { return(Dwreturn

How to read large files in C language-memory ing

Windows provides a wealth of operations for reading and writing files, such:1. FILE * fp, fstearm...; (C/C ++)2. CFile, CStdioFile...; (MFC)3. CreateFile, ReadFile...; (API)...It is sufficient to process general files (text/non-text. However, when

PHP uses redis

: This article mainly introduces the use of redis in PHP. if you are interested in the PHP Tutorial, you can refer to it. Connect ($ host, $ port); if ($ ret = false) {die ($ redis-> getLastError ());} $ ret = $ redis-> auth ($ user. "-". $ pwd. "

Manual permission reduction for Internet Explorer Protection

Text/FIG monoclonal antibody [S. U. S]Since the emergence of "webhorse", people have become increasingly cautious about accessing the Internet. If Google adds "this website may contain malware, which may harm your computer" under the webpage, you

Objective: To have only one instance of the target program in-memory

Q: Why do you want to achieve this goal?A: Because some programs need to use the computer above the hardware, such as the serial card collection and so on. In this case, the program can only be in memoryThere is a copy, otherwise it will rob

Serial communication Code. It was written by someone else, and I added some notes.

Communication.h:interface for the ccommunication class.///////////////////////////////////////////////////////// #if!defined (afx_communication_h__6ca00576_f088_11d1_89bb_8311a0f2733d__included_) #define AFX_ communication_h__6ca00576_f088_11d1_89bb_

MultiByteToWideChar and WideCharToMultiByte usage explanation

The problem that was found when writing the INI file today:TCHAR temp[ -]; //strcpy_s (temp, request.newversion);MultiByteToWideChar (CP_ACP,0, Request.newversion,-1, temp, -); WritePrivateProfileString (L"deviceinfo", L"firmwareversion",

fopen Open File Failure reason analysis

Scenario Description:Today, my colleague said, in the existing tool code, you cannot use fopen to open the file, and then walk through to assist. But in solving the problem, it has been assumed that the file path has a character escaping the problem,

Createmutex can be used to create a mutex for only one instance running a process.

Createmutex Function Check whether the current system has an instance of the specified process. If not, create a mutex. The createmutex () function can be used to create a famous or unknown mutex object. Its function prototype is VC statement

Windows API one-day training (55) flushfilebuffers and setfilepointer Functions

In PC In the hardware architecture, the fastest memory is CPU Register in the system, then to the second-level cache, and then to the System Ram Memory, and finally to the hard disk. This architecture determines how the operating system

Ce injection code triggered by dllmain independent

BelowCodeInject test. DLL into the telephone process and trigger the export function helloworld in test. dll. The first is the injected EXE: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 //

Monitoring Server Port

Monitoring Server Port Programmer's house Author: ominous Date: 21:10:00 # Include "stdafx. H"# Include # Include // # Include # Include # Include DWORD winapi clientthread (lpvoid lpparam ); Int main (

Implementation of the Simple debugger (d) Breakpoint

Int3 Breakpoint Principle:There are 2 steps to set breakpoints at one command, 1. Save the 1th byte of the instruction, 2. Replace this byte with 0xCCWe can take a look at the debugger I wrote:The u instruction shows the instruction E8 3eac000 at

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