C#代码获取另一程序的错误提示，并关闭窗口防止进程假死

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A程序报错弹框如下：

B程序捕捉到此错误消息，并关闭。B程序核心代码如下。

1. private void timer_Click(object sender, EventArgs e)
   
2. {
   
3.     //查找MessageBox的弹出窗口,注意对应标题
   
4.     IntPtr ptr = FindWindow(null, "提示");
   
5.     if (ptr != IntPtr.Zero)
   
6.     {
   
7.         EnumChildWindows(ptr.ToInt32(), callBackEnumChildWindows, 0);
   
8.         PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);//查找到弹窗则关闭它
   
9.     }
   
10. }
    
11. 
    
12. #region api
    
13. [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
    
14. private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);
    
15. 
    
16. [DllImport("user32.dll", CharSet = CharSet.Auto)]
    
17. public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
    
18. 
    
19. public const int WM_CLOSE = 0x10;
    
20. 
    
21. [DllImport("user32.dll")]
    
22. public static extern int EnumChildWindows(int hWndParent, CallBack lpfn, int lParam);
    
23. 
    
24. /// <summary>
    
25. /// 子窗口回调函数代理
    
26. /// </summary>
    
27. public static CallBack callBackEnumChildWindows = new CallBack(ChildWindowProcess);
    
28. 
    
29. /// <summary>
    
30. /// 子窗口回调处理函数
    
31. /// </summary>
    
32. /// <param name="hwnd"></param>
    
33. /// <param name="lParam"></param>
    
34. /// <returns></returns>
    
35. public static bool ChildWindowProcess(int hwnd, int lParam)
    
36. {
    
37.     StringBuilder text = new StringBuilder(200);
    
38.     int len;
    
39.     len = GetWindowText(hwnd, text, 200);
    
40.     if (len > 0)
    
41.     {
    
42.         if (text.ToString().Contains("未将对象引用"))
    
43.         {
    
44.             //找到错误
    
45.         }
    
46.     }
    
47.     return true;
    
48. }
    
49. [DllImport("user32.dll")]
    
50. public static extern int GetWindowText(int hWnd, StringBuilder lpString, int nMaxCount);
    
51. 
    
52. /// <summary>
    
53. /// 回调函数代理
    
54. /// </summary>
    
55. public delegate bool CallBack(int hwnd, int lParam);
    
56. 
    
57. [DllImport("user32.dll")]
    
58. public static extern int GetWindowTextLength(IntPtr hWnd);
    
59. #endregion

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