This is what I could find in the Object Browser.
Autodesk.AutoCAD.GraphicsSystem.View.Zoom(Double)
Autodesk.AutoCAD.GraphicsSystem.View.ZoomExtents(Autodesk.AutoCAD.Geometry.Point3d, Autodesk.AutoCAD.Geometry.Point3d)
Autodesk.AutoCAD.GraphicsSystem.View.ZoomWindow(Autodesk.AutoCAD.Geometry.Point2d, Autodesk.AutoCAD.Geometry.Point2d)
Regards - Nathan