Win32 API
Prozess- und Thread-Management

Erstellen Sie einen Prozess und überprüfen Sie den Beendigungscode

Dieses Beispiel startet Notepad, wartet, bis es geschlossen wird, und ruft seinen Beendigungscode ab.

#include <Windows.h>

int main()
{
   STARTUPINFOW si = { 0 };
   si.cb = sizeof(si);
   PROCESS_INFORMATION pi = { 0 };

   // Create the child process
   BOOL success = CreateProcessW(
      L"C:\\Windows\\system32\\notepad.exe",  // Path to executable
      NULL,                                   // Command line arguments
      NULL,                                   // Process attributes
      NULL,                                   // Thread attributes
      FALSE,                                  // Inherit handles
      0,                                      // Creation flags
      NULL,                                   // Environment
      NULL,                                   // Working directory
      &si,                                    // Startup info
      &pi);                                   // Process information

   if (success)
   {
      // Wait for the process to exit
      WaitForSingleObject(pi.hProcess, INFINITE);

      // Process has exited - check its exit code
      DWORD exitCode;
      GetExitCodeProcess(pi.hProcess, &exitCode);

      // At this point exitCode is set to the process' exit code

      // Handles must be closed when they are no longer needed
      CloseHandle(pi.hThread);
      CloseHandle(pi.hProcess);
   }
}

Referenzen (MSDN):

• CreateProcess
• WaitForSingleObject
• GetExitCodeProcess
• CloseHandle

Erstellen Sie einen neuen Thread

#include <Windows.h>

DWORD WINAPI DoStuff(LPVOID lpParameter)
{
    // The new thread will start here
    return 0;
}

int main()
{
    // Create a new thread which will start at the DoStuff function
    HANDLE hThread = CreateThread(
        NULL,    // Thread attributes
        0,       // Stack size (0 = use default)
        DoStuff, // Thread start address
        NULL,    // Parameter to pass to the thread
        0,       // Creation flags
        NULL);   // Thread id
    if (hThread == NULL)
    {
        // Thread creation failed.
        // More details can be retrieved by calling GetLastError()
        return 1;
    }

    // Wait for thread to finish execution
    WaitForSingleObject(hThread, INFINITE);

    // Thread handle must be closed when no longer needed
    CloseHandle(hThread);

    return 0;
}

Beachten Sie, dass das CRT auch die APIs _beginthread und _beginthreadex zum Erstellen von Threads _beginthreadex , die in diesem Beispiel nicht gezeigt werden. Der folgende Link erläutert die Unterschiede zwischen diesen APIs und der CreateThread API .

Referenzen (MSDN):

• CreateThread

• WaitForSingleObject

• CloseHandle

• _beginthread , _beginthreadex