如下代�：我翻译网上的c++例程。为何输出被visual studio的输出窗�截获了，我���到。程��行第一次�错，�第二次就报错了，也�知�原因。

private void button3_Click(object sender, System.EventArgs e)
{
SECURITY_ATTRIBUTES sa = new SECURITY_ATTRIBUTES();
sa.nLength = Marshal.SizeOf(sa);
sa.lpSecurityDescriptor = IntPtr.Zero;
sa.bInheritHandle = true;

System.IntPtr hread = IntPtr.Zero;
System.IntPtr hwrite = IntPtr.Zero;


if (!CreatePipe(ref hread, ref hwrite, ref sa, 0))
MessageBox.Show("管�创建失败!");

STARTUPINFO si = new STARTUPINFO();
si.cb = Marshal.SizeOf(si);
GetStartupInfo(ref si);
si.hStdOutput = hwrite;
si.hStdError = hwrite;
si.wShowWindow = 0;
si.dwFlags = 0x100 | 0x1;

PROCESS_INFORMATION pi = new PROCESS_INFORMATION();

if (!CreateProcess(null,"d:\\windows\\system32\\cmd.exe /c dir /?",
IntPtr.Zero,IntPtr.Zero,true,0x20, IntPtr.Zero,null,ref si, ref pi))
{
MessageBox.Show("进程创建失败!");
}

CloseHandle(hwrite);

System.Text.StringBuilder sb = new System.Text.StringBuilder(4096);
while (true)
{
int nNum=0;
if (false == ReadFile(hread,sb,4096,ref nNum,IntPtr.Zero))
break;
this.textBox1.Text += sb.ToString();
}

CloseHandle(hread);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}





[DllImport("Kernel32.dll")]
public static extern bool CreatePipe(
ref System.IntPtr hReadPipe,
ref System.IntPtr hWritePipe,
ref SECURITY_ATTRIBUTES lpPipeAttributes,
int nSize
);

[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
public int nLength;
public System.IntPtr lpSecurityDescriptor;
public bool bInheritHandle;
}

[StructLayout(LayoutKind.Sequential)]
public struct STARTUPINFO
{
public int cb;
public string lpReserved;
public string lpDesktop;
public string lpTitle;
public int dwX;
public int dwY;
public int dwXSize;
public int dwYSize;
public int dwXCountChars;
public int dwYCountChars;
public int dwFillAttribute;
public int dwFlags;
public int wShowWindow;
public int cbReserved2;
public IntPtr lpReserved2;
public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;
}

[DllImport("Kernel32.dll")]
public static extern void GetStartupInfo(
ref STARTUPINFO lpStartupInfo
);

[StructLayout(LayoutKind.Sequential)]
public struct PROCESS_INFORMATION
{
public IntPtr hProcess;
public IntPtr hThread;
public int dwProcessId;
public int dwThreadId;
}

[DllImport("Kernel32.dll")]
public static extern bool CreateProcess(
string lpApplicationName,
string lpCommandLine,
ref SECURITY_ATTRIBUTES lpProcessAttributes,
ref SECURITY_ATTRIBUTES lpThreadAttributes,
bool bInheritHandles,
int dwCreationFlags,
IntPtr lpEnvironment,
string lpCurrentDirectory,
ref STARTUPINFO lpStartupInfo,
ref PROCESS_INFORMATION lpProcessInformation
);

[DllImport("Kernel32.dll")]
public static extern bool CreateProcess(
string lpApplicationName,
string lpCommandLine,
IntPtr lpProcessAttributes,
IntPtr lpThreadAttributes,
bool bInheritHandles,
int dwCreationFlags,
IntPtr lpEnvironment,
string lpCurrentDirectory,
ref STARTUPINFO lpStartupInfo,
ref PROCESS_INFORMATION lpProcessInformation
);

[DllImport("Kernel32.dll")]
public static extern bool CloseHandle(
IntPtr hObject
);

[DllImport("Kernel32.dll")]
public static extern bool ReadFile(
IntPtr hFile,
System.Text.StringBuilder lpBuffer,
int nNumberOfBytesToRead,
ref int lpNumberOfBytesRead,
IntPtr lpOverlapped
);

ÄúºÃ£º

¹ØÓÚÖض¨ÏòÎÊÌ⣬Äú¿ÉÒÔÊ×ÏȲο´ÒÔÏÂÁ¬½Ó£º
http://support.microsoft.com/kb/190351/zh-cn
http://www.codeguru.com/Cpp/misc/misc/article.php/c277


¹ùÐù
ÔÚÏß¼¼ÊõÖ§³Ö¹¤³Ìʦ
΢ÈíÈ«Çò¼¼ÊõÖ§³ÖÖÐÐÄ
---------------------------------------------------------------------------------------
ÎÒÃǵķþÎñʱ¼ä£ºÖÜÒ»ÖÁÖÜÎå9:00-18:00£¨½Ú¼ÙÈÕ³ýÍ⣩¡£ÎÒÃǽ«ÔÚÁ½¸ö¹¤×÷ÈÕ£¨48Сʱ£©ÄÚÌṩ³õʼ»ØÓ¦£¬²¢ºÍÄúÒ»ÆðÑо¿²¢½â¾öÎÊÌâ¡£¸ü¶à΢ÈíÐÂÎÅ×é¼¼ÊõÖ§³ÖÐÅÏ¢£¬Çë·ÃÎÊ£ºhttp://support.microsoft.com/gp/newsgroupsupport/zh-cn.

»ØÌûʱ£¬ÇëÔÚÄúµÄÐÂÎÅ×éÔĶÁÆ÷ÖÐʹÓ᰻ظ´×é(Reply to Group)¡±£¬Õ⽫°ïÖúÆäËûÓû§´ÓÄúµÄÌáÎÊÖлñÒæ
---------------------------------------------------------------------------------------
±¾Ìù×ÓÒÔ¡±ÏÖ×´¡±ÌṩÇÒûÓÐÈκε£±££¬Í¬Ê±Ò²Ã»ÓÐÊÚÓèÈκÎȨÀû¡£

ÄúºÃ£º
´úÂëÖеĹØÓÚSTARTUPINFOµÄ¸³ÖµÓÐЩ´íÎó£¬Ó¦¸ÃÕâÑù£º
si.hStdOutput = hread;
si.hStdError = hread;
si.hStdInput = hwrite;
¹ØÓÚ´ËÖ÷Ì⣬ÄúÊÇ·ñ»¹ÓÐÒÉÎÊ£¿ÈçÓÐÈκÎÒÉÎÊ£¬»¶Ó­ÔÚ΢ÈíÖÐÎÄÐÂÎÅ×éÌÖÂÛ¡£

¹ùÐù
ÔÚÏß¼¼ÊõÖ§³Ö¹¤³Ìʦ
΢ÈíÈ«Çò¼¼ÊõÖ§³ÖÖÐÐÄ
---------------------------------------------------------------------------------------
ÎÒÃǵķþÎñʱ¼ä£ºÖÜÒ»ÖÁÖÜÎå9:00-18:00£¨½Ú¼ÙÈÕ³ýÍ⣩¡£ÎÒÃǽ«ÔÚÁ½¸ö¹¤×÷ÈÕ£¨48Сʱ£©ÄÚÌṩ³õʼ»ØÓ¦£¬²¢ºÍÄúÒ»ÆðÑо¿²¢½â¾öÎÊÌâ¡£¸ü¶à΢ÈíÐÂÎÅ×é¼¼ÊõÖ§³ÖÐÅÏ¢£¬Çë·ÃÎÊ£ºhttp://support.microsoft.com/gp/newsgroupsupport/zh-cn.

»ØÌûʱ£¬ÇëÔÚÄúµÄÐÂÎÅ×éÔĶÁÆ÷ÖÐʹÓ᰻ظ´×é(Reply to Group)¡±£¬Õ⽫°ïÖúÆäËûÓû§´ÓÄúµÄÌáÎÊÖлñÒæ
---------------------------------------------------------------------------------------
±¾Ìù×ÓÒÔ¡±ÏÖ×´¡±ÌṩÇÒûÓÐÈκε£±££¬Í¬Ê±Ò²Ã»ÓÐÊÚÓèÈκÎȨÀû¡£

在.net中的�定��进程的控制�输出，�用这么麻烦的。其实�下�这样几行就�以了。
private void button3_Click_2(object sender, System.EventArgs e)
{
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = "d:\\windows\\system32\\cmd.exe";
psi.Arguments = " /c dir /?";
psi.UseShellExecute = false;
psi.RedirectStandardOutput = true;
psi.CreateNoWindow = false;
psi.WindowStyle = ProcessWindowStyle.Hidden;

Process pro = Process.Start(psi);
this.textBox1.Text += pro.StandardOutput.ReadToEnd();
pro.WaitForExit();
}

但原�的程�为什么�行，我还是�懂。还是很谢谢你的回答。我自己绕了个大弯，�回到了.net，呵呵

“t-xguo@prcvap.microsoft.com�编写：

> 您好：
> 代�中的关于STARTUPINFO的赋值有些错误，应该这样：
> si.hStdOutput = hread;
> si.hStdError = hread;
> si.hStdInput = hwrite;
> 关于此主题，您是�还有疑问？如有任何疑问，欢迎在微软中文新闻组讨论。
>
> 郭轩
> 在线技术支�工程师
> 微软全�技术支�中心
> ---------------------------------------------------------------------------------------
> 我们的�务时间：周一至周五9:00-18:00（节�日除外）。我们将在两个工作日（48�时）内�供�始回应，并和您一起研究并解决问题。更多微软新闻组技术支�信�，请访问：http://support.microsoft.com/gp/newsgroupsupport/zh-cn.
>
> 回帖时，请在您的新闻组阅读器中使用“回�组(Reply to Group)�，这将帮助其他用户从您的�问中获益
> ---------------------------------------------------------------------------------------
> 本贴�以�现状��供且没有任何担�，�时也没有授予任何�利。