• WIN32 CreateToolhelp32Snapshot 查找进程


    PROCESSENTRY32  PROCESSENTRY32 Structure
      Describes an entry from a list of the processes residing in the system address space when a snapshot was taken.
      用来存放快照进程信息的一个结构体。(存放进程信息和调用成员输出进程信息)
      用来 Process32First指向第一个进程信息,并将进程信息抽取到PROCESSENTRY32中。用 Process32Next指向下一条进程信息。
      Syntax
      C++
      typedef struct tagPROCESSENTRY32
      {
      DWORD dwSize;
      DWORD cntUsage;
      DWORD th32ProcessID;
      ULONG_PTR th32DefaultHeapID;
      DWORD th32ModuleID;
      DWORD cntThreads;
      DWORD th32ParentProcessID;
      LONG pcPriClassBase;
      DWORD dwFlags;
      TCHAR szExeFile[MAX_PATH];
      } PROCESSENTRY32, *PPROCESSENTRY32;
      Members
      dwSize (结构的大小)The size of the structure, in bytes. Before calling the Process32First function, set this member to sizeof(PROCESSENTRY32). If you do not initialize dwSize, Process32First fails.
      (这个结构的长度,以字节为单位,初始化一个实例以后调用Process32First函数,设置成员的大小sizeof(PROCESSENTRY32).如果你没用PROCESSENTRY32中的成员dwSize初始化,pricess32First将会失败。)
      cntUsage (此进程的引用计数)This member is no longer used and is always set to zero.
      (这个成员已经很久没有使用,总是设置为零。)
      th32ProcessID 进程ID=process identifier=PIDThe process identifier.
      (这个就是任务管理器里面的进程的PID,打开任务管理器--查看---选择列---PID(勾选)就可以显示进程的标示符(PID))
      th32DefaultHeapID 进程默认堆IDThis member is no longer used and is always set to zero.
      (这个成员已经很久没有使用,总是设置为零。)
      th32ModuleID 进程模块IDThis member is no longer used and is always set to zero.
      (这个成员已经很久没有使用,总是设置为零。)
      cntThreads 此进程开启的线程计数The number of execution threads started by the process.
      (这个成员执行线程开始的进程。)
      th32ParentProcessID (父进程的ID)The identifier of the process that created this process (its parent process).
      pcPriClassBase .(线程优先权)The base priority of any threads created by this process
      当前进程创建的任何一个线程的基础优先级,即在当前进程内创建线程的话,其基本优先级的值。
      dwFlags This member is no longer used, and is always set to zero.
      (这个成员已经很久没有使用,总是设置为零。)
      szExeFile (一个数组)进程全名The name of the executable file for the process. To retrieve the full path to the executable file, call the Module32First function and check the szExePath member of the MODULEENTRY32 structure that is returned. However, if the calling process is a 32-bit process, you must call the QueryFullProcessImageName function to retrieve the full path of the executable file for a 64-bit process.
      (进程的可执行文件名称。要获得可执行文件的完整路径,应调用Module32First函数,再检查其返回的MODULEENTRY32结构的szExePath成员。但是,如果被调用进程是一个32位程序,您必须调用QueryFullProcessImageName函数去获取64位进程的可执行文件完整路径名。)

    #include "StdAfx.h"
    #include "windows.h"
    #include "tlhelp32.h"
    #include "stdio.h"
    
    
    int main(int argc, char* argv[])
    {
    
        PROCESSENTRY32 pe32;
        //在使用这个结构前,先设置它的大小
        pe32.dwSize = sizeof(pe32);
        //给系统内所有的进程拍个快照
        HANDLE hProcessSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
        if (hProcessSnap == INVALID_HANDLE_VALUE)
        {
    
            printf("CreateToolhelp32Snapshot 调用失败.\n");
            return -1;
        }
        //遍历进程快照,轮流显示每个进程的信息
        BOOL bMore = ::Process32First(hProcessSnap,&pe32);
        while (bMore)
        {
            printf("进程名称:%s\n",pe32.szExeFile);
            printf("进程ID:%u\n\n",pe32.th32ProcessID);
            bMore = ::Process32Next(hProcessSnap,&pe32);
        }
        //不要忘记清除掉snapshot对象
        ::CloseHandle(hProcessSnap);
    
        getchar();
        return 0;
    }
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  • 原文地址:https://www.cnblogs.com/ganxiang/p/13215217.html
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