C#中进程的挂起与恢复

public static class ProcessMgr {  /// <summary>  /// The process-specific access rights.  /// </summary>  [Flags]  public enum ProcessAccess : uint  {   /// <summary>   /// Required to terminate a process using TerminateProcess.   /// </summary>   Terminate = 0x1,   /// <summary>   /// Required to create a thread.   /// </summary>   CreateThread = 0x2,   /// <summary>   /// Undocumented.   /// </summary>   SetSessionId = 0x4,   /// <summary>   /// Required to perform an operation on the address space of a process (see VirtualProtectEx and WriteProcessMemory).   /// </summary>   VmOperation = 0x8,   /// <summary>   /// Required to read memory in a process using ReadProcessMemory.   /// </summary>   VmRead = 0x10,   /// <summary>   /// Required to write to memory in a process using WriteProcessMemory.   /// </summary>   VmWrite = 0x20,   /// <summary>   /// Required to duplicate a handle using DuplicateHandle.   /// </summary>   DupHandle = 0x40,   /// <summary>   /// Required to create a process.   /// </summary>   CreateProcess = 0x80,   /// <summary>   /// Required to set memory limits using SetProcessWorkingSetSize.   /// </summary>   SetQuota = 0x100,   /// <summary>   /// Required to set certain information about a process, such as its priority class (see SetPriorityClass).   /// </summary>   SetInformation = 0x200,   /// <summary>   /// Required to retrieve certain information about a process, such as its token, exit code, and priority class (see OpenProcessToken, GetExitCodeProcess, GetPriorityClass, and IsProcessInJob).   /// </summary>   QueryInformation = 0x400,   /// <summary>   /// Undocumented.   /// </summary>   SetPort = 0x800,   /// <summary>   /// Required to suspend or resume a process.   /// </summary>   SuspendResume = 0x800,   /// <summary>   /// Required to retrieve certain information about a process (see QueryFullProcessImageName). A handle that has the PROCESS_QUERY_INFORMATION access right is automatically granted PROCESS_QUERY_LIMITED_INFORMATION.   /// </summary>   QueryLimitedInformation = 0x1000,   /// <summary>   /// Required to wait for the process to terminate using the wait functions.   /// </summary>   Synchronize = 0x100000  }  [DllImport("ntdll.dll")]  private static extern uint NtResumeProcess([In] IntPtr processHandle);  [DllImport("ntdll.dll")]  private static extern uint NtSuspendProcess([In] IntPtr processHandle);  [DllImport("kernel32.dll", SetLastError = true)]  private static extern IntPtr OpenProcess(   ProcessAccess desiredAccess,   bool inheritHandle,   int processId);  [DllImport("kernel32.dll", SetLastError = true)]  [return: MarshalAs(UnmanagedType.Bool)]  private static extern bool CloseHandle([In] IntPtr handle);  public static void SuspendProcess(int processId)  {   IntPtr hProc = IntPtr.Zero;   try   {    // Gets the handle to the Process    hProc = OpenProcess(ProcessAccess.SuspendResume, false, processId);    if (hProc != IntPtr.Zero)     NtSuspendProcess(hProc);   }   finally   {    // Don't forget to close handle you created.    if (hProc != IntPtr.Zero)     CloseHandle(hProc);   }  }  public static void ResumeProcess(int processId)  {   IntPtr hProc = IntPtr.Zero;   try   {    // Gets the handle to the Process    hProc = OpenProcess(ProcessAccess.SuspendResume, false, processId);    if (hProc != IntPtr.Zero)     NtResumeProcess(hProc);   }   finally   {    // Don't forget to close handle you created.    if (hProc != IntPtr.Zero)     CloseHandle(hProc);   }  } }

 private void RunTestProcess(bool hidden = false)  {   string appPath = Path.GetDirectoryName(Application.ExecutablePath);   string testAppPath = Path.Combine(appPath, "TestApp.exe");   var pi = new ProcessStartInfo();   pi.FileName = testAppPath;   pi.Arguments = this.Handle.ToString();   pi.WindowStyle = hidden ? ProcessWindowStyle.Hidden : ProcessWindowStyle.Normal;   this.childProcess = Process.Start(pi);   txtInfo.Text = string.Format("子进程ID：{0}/r/n子进程名：{1}", childProcess.Id, childProcess.ProcessName);   ...  }

private void btnWork_Click(object sender, EventArgs e)  {   if (this.childProcess == null || this.childProcess.HasExited)    return;   if ((int)btnWork.Tag == 0)   {    btnWork.Tag = 1;    btnWork.Text = "恢复";    ProcessMgr.SuspendProcess(this.childProcess.Id);   }   else   {    btnWork.Tag = 0;    btnWork.Text = "挂起";    ProcessMgr.ResumeProcess(this.childProcess.Id);   }  }

 private void timer_Tick(object sender, EventArgs e)  {   if (progressBar.Value < progressBar.Maximum)    progressBar.Value += 1;   else    progressBar.Value = 0;   if (this.hostHandle != IntPtr.Zero)    SendMessage(this.hostHandle, WM_PROGRESS, 0, progressBar.Value);  }