Creating a new Layout without a default viewport

[Anonymous]

In AutoCAD you can check "Create viewport in new Layout" in Meny-> Tools->Options->Display.
After that if you create in managed code a new Layout, a default viewport is automatically created.
I need to know if there is a possibily to turn off the creating of a new viewport in managed code,
something like in ObjectARX:

AcApLayoutManager: setCreateViewports( Adesk::kFalse );

Thanks in advance.

[mdelanno]

{code}
using System.Runtime.InteropServices;
using Autodesk.AutoCAD.Interop;

AcadPreferences prefs = Autodesk.AutoCAD.ApplicationServices.Application.Preferences as AcadPreferences;
prefs.Display.LayoutCreateViewport = false;
{code}