我的服务程序总是报异常退出, 怎么办?

我的服务程序就是延时5秒后退出(实际需求是启动另一个进程后退出), 结果运行时总弹出对话框, 报服务异常退出, 怎么办?
void WINAPI ServiceMain()
{
    // Register the control request handler
    status.dwCurrentState = SERVICE_START_PENDING;
status.dwControlsAccepted = SERVICE_ACCEPT_STOP; //注册服务控制
    hServiceStatus = RegisterServiceCtrlHandler(szServiceName, ServiceStrl);
    if (hServiceStatus == NULL)
    {
        return;
    }
    SetServiceStatus(hServiceStatus, &status);    status.dwWin32ExitCode = S_OK;
    status.dwCheckPoint = 0;
    status.dwWaitHint = 0;
status.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(hServiceStatus, &status);    Sleep(5000); //延时 status.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(hServiceStatus, &status);}void WINAPI ServiceStrl(DWORD dwOpcode)
{
    switch (dwOpcode)
    {
    case SERVICE_CONTROL_STOP:
status.dwCurrentState = SERVICE_STOP_PENDING;
        SetServiceStatus(hServiceStatus, &status);
        PostThreadMessage(dwThreadID, WM_CLOSE, 0, 0);
        break;
    case SERVICE_CONTROL_PAUSE:
        break;
    case SERVICE_CONTROL_CONTINUE:
        break;
    case SERVICE_CONTROL_INTERROGATE:
        break;
    case SERVICE_CONTROL_SHUTDOWN:
        break;
    default:
        ;
    }
}