AutoCAD 2010 :: Model View From Block VLISP

I'm trying to create something great VLISP app that extracts an attribute and vertices for each instance of a selected block and creates a model view based on those inputs. This is my first attempt at a VLISP app.

Let's say there's a drawing populated with a block that has multiple visibility states for different size viewports and an attribute to label your sheet number. Once they are laid out, you run this app and it prompts you to select the "viewport block" that is placed. The app extracts the block name and for each instance it extracts the attribute name (sheet number) and vertices of the extents for the viewport. You will need to add the insertion point to the vertices, so that will have to be extracted as well. The app will then run the VIEW command to make a model view with the extracted data from each block.