（50分）通过Process打开notepad.exe后，如何向记事本中写入信息呢？

[dazhu2]

通过Process打开notepad.exe后，如何向记事本中写入信息呢？
代码如下：
Process p = new Process();
p.StartInfo.FileName = "notepad.exe";
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput=true;
p.StartInfo.RedirectStandardError=true;
p.StartInfo.UseShellExecute = false;
p.Start();

p.StandardInput.WriteLine(" 计算结果如下：");

但打开的记事本中为空，没有想写入的字符，请问该如何实现改功能？

[wuyq11]

[DllImport("User32.DLL")]
public static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, string lParam);
[DllImport("User32.DLL")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
public const uint WM_SETTEXT = 0x000C;

System.Diagnostics.Process Proc;
try
{
Proc = new System.Diagnostics.Process();
Proc.StartInfo.FileName = "notepad.exe";
Proc.StartInfo.UseShellExecute = false;
Proc.StartInfo.RedirectStandardInput = true;
Proc.StartInfo.RedirectStandardOutput = true;
Proc.Start();
}
catch
{
Proc = null;
}
if (Proc != null)
{
while (Proc.MainWindowHandle == IntPtr.Zero)
{
Proc.Refresh();
}
IntPtr vHandle = FindWindowEx(Proc.MainWindowHandle, IntPtr.Zero, "Edit", null);
SendMessage(vHandle, WM_SETTEXT, 0, "Message");
}
}

[dazhu2]

ok