如何在C＃/ Win32中将文本发送到记事本？

    [Dllimport("user32.dll", EntryPoint = "FindWindowEx")]    public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);    [Dllimport("User32.dll")]    public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, string lParam);    private void button1_Click(object sender, EventArgs e)    {        Process [] notepads=Process.GetProcessesByName("notepad");        if(notepads.Length==0)return;         if (notepads[0] != null)        { IntPtr child= FindWindowEx(notepads[0].MainWindowHandle, new IntPtr(0), "Edit", null); SendMessage(child, 0x000C, 0, textBox1.Text);        }    }

WM_SETTEXT = 0x000c