创建一个进程和两个管道，实现与进程通信

// createprocess_.cpp : 定义控制台应用程序的入口点。
//
#include <Windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <tchar.h>
#include <conio.h>
#include <windows.h>
#include <MMSystem.h>

int main(int argc, char* argv[])
{
//Main_t:
    char  commanline[40];
    char  Inch;
    char  cnt = 0;
    char  *pComman;

    TCHAR szCommanLine[] = TEXT("C:\\Documents and Settings\\Administrator\\My Documents\\Visual Studio 2010\\....exe");
    TCHAR szCommandLine[] = TEXT("openvpn --config client.ovpn");

    DWORD dwMode;
    HANDLE hStdinRead, hStdinWrite, hStdoutRead, hStdoutWrite;
    SECURITY_ATTRIBUTES sa;
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory((&si),sizeof(si));
    si.cb = sizeof(si);
    si.dwFlags = STARTF_FORCEONFEEDBACK;
    ZeroMemory((&pi),sizeof(pi));

    
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.bInheritHandle = TRUE;
    sa.lpSecurityDescriptor = NULL;
    CreatePipe(&hStdinRead, &hStdinWrite, &sa, 0);
    CreatePipe(&hStdoutRead, &hStdoutWrite, &sa, 0);

    si.cb = sizeof(STARTUPINFO);
    si.lpReserved = si.lpDesktop = si.lpTitle = NULL;
    si.dwFlags = STARTF_USESTDHANDLES;
    si.cbReserved2 = 0;
    si.lpReserved2 = NULL;
    si.hStdInput = hStdinRead;
    si.hStdOutput = hStdoutWrite;
    si.hStdError = hStdoutWrite;


    if (!CreateProcess(szCommanLine,//szCommanLine
        szCommandLine,//NULL
        NULL,
        NULL,
        FALSE,
        NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW,
        NULL,
        NULL,
        &si,
        &pi)
        )
    {
        char ch;
        printf("Create Process false:%d\n",GetLastError());
        printf("Do you want try agin?(Y/N)");
        ch = getchar();
        if (ch=='Y')
        {
            CloseHandle(pi.hProcess);
            CloseHandle(pi.hThread);
            system("cls");
//            goto Main_t;
            exit(0);
        }
    }
    else
    {
        printf("The application program you want already execute.....\n");
        //wait for the process exits.
        WaitForSingleObject(pi.hProcess,INFINITE);
        printf("The program is closing....\n");
        //close the process and thread handles.
        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);

//        system("cls");
//        goto Main_t;
    }
    char lpBuffer[256];
    memset(lpBuffer,0,sizeof(lpBuffer));
    DWORD nBytesRead;
    while(1)
    {
        if (ReadFile(hStdoutWrite,lpBuffer,sizeof(lpBuffer) - 1,&nBytesRead,NULL))
        { 
            printf("%s\n",lpBuffer);
        }
        else
            Sleep(100); 
    }
    return 0;
}

上面程序没有对一些函数调用的返回参数的判断，这是个不好的习惯。。。。鉴
这个程序使用了createpipe and createprocess 可以创建一个进程。
进程创建的参数，第一个参数不为空则必定为以.exe结尾的字符串；第二个参数根据第一个参数而不同，一般为命令行。