發送信息給其它工藝

Question

for (int i = 0; i < n; i++) 
{ 
    const char* cstr = strings[i].c_str(); 
    swprintf_s(fullCommandLine, L"\"%s\" \"%s\" %S", pathToModule, pathToFile, cstr); 
    if(CreateProcess(NULL, 
     (LPWSTR)fullCommandLine, 
     NULL, 
     NULL, 
     FALSE, 
     0, 
     NULL, 
     NULL, 
     &si, 
     &pi)) 
    { 
     cout << "succes"; 
    } 
    else cout << "fail"; 
} 

我創建N個procesess找到字符串中這樣給定的文件，並在我的模塊（wchich會在文件中給出的字符串）我想發送消息給其他N-1處理退出

while (file >> readout) 
{ 
    if (readout == search) 
    { 
     cout << "I found string"; 
     SendMessage(/*what should be here*/); 
    } 
} 

從哪裏我可以得到處理這些其他進程？

Answer 1

請參閱我的PostThreadMessage to Console Application。

我之所以這麼做，是因爲它肯定有可能向控制檯程序發送消息，我們只需製作一個消息循環，就像從控制檯程序中顯示一個窗口一樣。

請注意，PostThreadMessage需要一個線程ID，而不是進程ID。每個進程都有一個線程ID，一個進程的線程ID在CreateProcess的PROCESS_INFORMATION中。

以下是一個較大的示例，但更容易用於演示PostThreadMessage在控制檯程序中的工作方式。如果沒有參數，這個程序會自動調用它（傳遞它的線程ID），然後等待新進程發送消息。如果有參數，那麼它會假設參數是一個線程ID，並向該線程發送一條消息，後面跟着一個WM_QUIT。

#include "stdafx.h" 

int _tmain(int argc, _TCHAR* argv[]) 
{ 
    TCHAR szCmdline[300]; 
    PROCESS_INFORMATION piProcInfo; 
    STARTUPINFO siStartInfo; 
    BOOL bSuccess = FALSE; 

    ZeroMemory(&piProcInfo, sizeof(PROCESS_INFORMATION)); 
    ZeroMemory(&siStartInfo, sizeof(STARTUPINFO)); 
    siStartInfo.cb = sizeof(STARTUPINFO); 
    siStartInfo.hStdError = NULL; 
    siStartInfo.hStdOutput = NULL; 
    siStartInfo.hStdInput = NULL; 

    DWORD dwThread; 
    MSG Msg; 
    TCHAR ThreadIdBuffer[40]; 

    // if no argument then execute ourself then wait for a message from that thread 
    if (argc == 1) { 
     _itot_s(GetCurrentThreadId(), ThreadIdBuffer, 40, 10); 
     szCmdline[0] = '"'; 
     szCmdline[1] = 0; 
     _tcscat_s(szCmdline, 300, argv[0]); // ourself 
     int n = _tcslen(szCmdline); 
     szCmdline[n++] = '"'; 
     szCmdline[n++] = ' '; 
     szCmdline[n++] = 0; 
     _tcscat_s(szCmdline, 300, ThreadIdBuffer); // our thread id 
     bSuccess = CreateProcess(argv[0], // execute ourself 
      szCmdline,  // command line 
      NULL,   // process security attributes 
      NULL,   // primary thread security attributes 
      TRUE,   // handles are inherited 
      0,    // creation flags 
      NULL,   // use parent's environment 
      NULL,   // use parent's current directory 
      &siStartInfo, // STARTUPINFO pointer 
      &piProcInfo); // receives PROCESS_INFORMATION 
     if (!bSuccess) { 
      std::cout << "Process not started\n"; 
      return 0; 
      } 
     std::cout << "Waiting\n"; 
     // Now wait for the other process to send us a message 
     while (GetMessage(&Msg, NULL, 0, WM_USER)) { 
      if (Msg.message == WM_COMMAND) 
       std::cout << "WM_COMMAND\n"; 
      else 
       std::cout << "Message: " << Msg.message << '\n'; 
     } 
     std::cout << "End of message loop\n"; 
     return 0; 
    } 

    // if there is an argument then assume it is a threadid of another one of us 
    std::cout << "Press Enter to send the message\n"; 
    if (std::wcin.get() != '\n') 
     return 0; 
    dwThread = _wtoi(argv[1]); 
    if (!PostThreadMessage(dwThread, WM_COMMAND, (WPARAM)0, (LPARAM)0)) 
     std::cout << GetLastError() << " PostThreadMessage error\n"; 
    if (!PostThreadMessage(dwThread, WM_QUIT, (WPARAM)0, (LPARAM)0)) 
     std::cout << GetLastError() << " PostThreadMessage error\n"; 
    return 0; 
}