c++代码实现Windows后台服务，定时监控多个进程，实现重启打开界面

实现Windows后台服务可以使用Windows Service API，监控进程可以使用Process Monitor API，重启进程可以使用CreateProcess API。以下是一个简单的示例代码：

#include <windows.h>
#include <tchar.h>
#include <psapi.h>

// 定义服务名和显示名称
#define SERVICE_NAME _T("MyService")
#define DISPLAY_NAME _T("My Service")

// 定义监控的进程信息
struct ProcessInfo {
    DWORD pid;
    TCHAR name[MAX_PATH];
};

// 定义全局变量
SERVICE_STATUS g_serviceStatus;
SERVICE_STATUS_HANDLE g_serviceStatusHandle;

// 定义监控的进程列表
ProcessInfo g_processList[] = {
    {1234, _T("process1.exe")},
    {5678, _T("process2.exe")},
    // ...
};

// 声明服务控制函数
void WINAPI ServiceCtrlHandler(DWORD controlCode);

// 声明服务主函数
void WINAPI ServiceMain(DWORD argc, LPTSTR* argv);

// 监控进程函数
void MonitorProcesses();

// 重启进程函数
void RestartProcess(DWORD pid);

int _tmain(int argc, TCHAR* argv[])
{
    // 定义服务表
    SERVICE_TABLE_ENTRY serviceTable[] = {
        {SERVICE_NAME, ServiceMain},
        {NULL, NULL}
    };

    // 注册服务控制函数
    if (!StartServiceCtrlDispatcher(serviceTable)) {
        return GetLastError();
    }

    return 0;
}

void WINAPI ServiceCtrlHandler(DWORD controlCode)
{
    switch (controlCode) {
    case SERVICE_CONTROL_STOP:
        // 停止服务
        g_serviceStatus.dwCurrentState = SERVICE_STOP_PENDING;
        g_serviceStatus.dwWin32ExitCode = NO_ERROR;
        g_serviceStatus.dwCheckPoint = 0;
        g_serviceStatus.dwWaitHint = 0;
        SetServiceStatus(g_serviceStatusHandle, &g_serviceStatus);
        // TODO: 停止服务的代码
        g_serviceStatus.dwCurrentState = SERVICE_STOPPED;
        SetServiceStatus(g_serviceStatusHandle, &g_serviceStatus);
        break;
    case SERVICE_CONTROL_INTERROGATE:
        // 更新服务状态
        SetServiceStatus(g_serviceStatusHandle, &g_serviceStatus);
        break;
    default:
        break;
    }
}

void WINAPI ServiceMain(DWORD argc, LPTSTR* argv)
{
    // 注册服务控制函数
    g_serviceStatusHandle = RegisterServiceCtrlHandler(SERVICE_NAME, ServiceCtrlHandler);
    if (g_serviceStatusHandle == NULL) {
        return;
    }

    // 设置服务状态
    g_serviceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
    g_serviceStatus.dwCurrentState = SERVICE_START_PENDING;
    g_serviceStatus.dwControlsAccepted = SERVICE_CONTROL_STOP | SERVICE_CONTROL_INTERROGATE;
    g_serviceStatus.dwWin32ExitCode = NO_ERROR;
    g_serviceStatus.dwServiceSpecificExitCode = 0;
    g_serviceStatus.dwCheckPoint = 0;
    g_serviceStatus.dwWaitHint = 0;
    SetServiceStatus(g_serviceStatusHandle, &g_serviceStatus);

    // TODO: 启动服务的代码
    MonitorProcesses();

    // 设置服务状态
    g_serviceStatus.dwCurrentState = SERVICE_RUNNING;
    SetServiceStatus(g_serviceStatusHandle, &g_serviceStatus);
}

void MonitorProcesses()
{
    while (g_serviceStatus.dwCurrentState == SERVICE_RUNNING) {
        // 遍历进程列表
        for (int i = 0; i < sizeof(g_processList) / sizeof(g_processList[0]); i++) {
            // 获取进程句柄
            HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
                FALSE, g_processList[i].pid);
            if (hProcess == NULL) {
                // 进程不存在，重启进程
                RestartProcess(g_processList[i].pid);
            }
            else {
                // 获取进程文件名
                TCHAR filename[MAX_PATH];
                if (GetModuleFileNameEx(hProcess, NULL, filename, MAX_PATH)) {
                    // 检查进程文件名是否正确
                    if (_tcsicmp(filename, g_processList[i].name) != 0) {
                        // 进程文件名不正确，重启进程
                        RestartProcess(g_processList[i].pid);
                    }
                }
                CloseHandle(hProcess);
            }
        }
        // 等待一段时间再检查进程
        Sleep(5000);
    }
}

void RestartProcess(DWORD pid)
{
    // 结束进程
    HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
    if (hProcess != NULL) {
        TerminateProcess(hProcess, 0);
        CloseHandle(hProcess);
    }

    // 等待一段时间再打开进程
    Sleep(5000);

    // 打开进程
    STARTUPINFO startupInfo = { sizeof(startupInfo) };
    PROCESS_INFORMATION processInfo;
    if (CreateProcess(NULL, _T("process.exe"), NULL, NULL, FALSE, 0, NULL, NULL,
        &startupInfo, &processInfo)) {
        CloseHandle(processInfo.hProcess);
        CloseHandle(processInfo.hThread);
    }
}

这个示例代码可以定时监控多个进程，如果进程不存在或文件名不正确，则重启进程。你可以根据实际需求修改进程列表和重启进程的命令行参数。注意，这个示例代码只是一个简单的示例，对于实际应用场景可能需要更复杂的逻辑处理。