The content of any layout is distributed among two different ActiveX objects: the Layout object and the Block object. The Layout object contains the plot settings and the visual properties of the layout as it appears in the AutoCAD user interface. The Block object contains the geometry for the layout.
Each Layout object is associated with one, and only one, Block object. To access the Block object associated with a given layout, use the Block property. Conversely, each Block object is associated with one, and only one, Layout object. To access the Layout object associated with a given Block, use the Layout property for that block.