Anyone know how to do this?  I have CreateProcessWithLogonW working in my C#
app, but I cannot seem to be able to attach a handle to the StdOutput in the
STARTUPINFO structure -- no matter what I do, I get a "Invalid Handle" error
(Win32 error 6)

Here is some code for anyone that is interested :)

  AdvApi32.StartupInfo si    = new AdvApi32.StartupInfo();
  AdvApi32.ProcessInfoEx pi    = new AdvApi32.ProcessInfoEx();

  IntPtr       hRead;
  IntPtr       hWrite;
  Kernel32.SECURITY_ATTRIBUTES sa = new
CriticalSites.Win32.Kernel32.SECURITY_ATTRIBUTES();

  sa.nLength    = Marshal.SizeOf(typeof(Kernel32.SECURITY_ATTRIBUTES));
  sa.bInheritHandle  = true;
  sa.lpSecurityDescriptor = IntPtr.Zero;

  si.cb   = Marshal.SizeOf(typeof(AdvApi32.StartupInfo));
  si.dwFlags  = 0;
  si.wShowWindow = User32.ShowWindowFlags.SW_HIDE;
  si.desktop  = "";
  si.lpReserved = String.Empty;
  si.cbReserved2 = 0;
  si.lpReserved2 = IntPtr.Zero;
  si.dwFlags  |= (int) AdvApi32.StartFFlags.STARTF_USESHOWWINDOW;
  si.hStdError = IntPtr.Zero;
  si.hStdInput = IntPtr.Zero;
  si.hStdOutput = IntPtr.Zero;

  if (psi.RedirectStandardError)
  {
   hRead = IntPtr.Zero;
   hWrite = IntPtr.Zero;

   if (!Kernel32.CreatePipe(ref hRead, ref hWrite, ref sa, 0))
   {
    throw new
System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());
   }

  if (si.hStdError != IntPtr.Zero || si.hStdOutput != IntPtr.Zero ||
si.hStdOutput != IntPtr.Zero)
  {
   si.dwFlags |= (int) AdvApi32.StartFFlags.STARTF_USESTDHANDLES;
  }

   si.hStdError = hRead;
  }

  if (psi.RedirectStandardOutput)
  {
   hRead = IntPtr.Zero;
   hWrite = IntPtr.Zero;

   if (!Kernel32.CreatePipe(ref hRead, ref hWrite, ref sa, 0))
   {
    throw new
System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error());
   }

   si.hStdOutput = hRead;
  }

  if (!AdvApi32.CreateProcessWithLogonW(sUserName, sDomain, sPassword,
AdvApi32.LogonFlags.LOGON_WITH_PROFILE, psi.FileName, psi.Arguments,
iCreateFlags, IntPtr.Zero, psi.WorkingDirectory, ref si, out pi))
  {
   throw new
System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error()); <-- this
is always throw with Win32 Error 6
  }