CREO2.0 to AUTOCAD2015 through Excel VBA

I need a sample VBA code written, which: 1) code starts in AUTOCAD 2015 from a menu button 2) opens a predefined Excel sheet 3) starts CREO2.0 in background 4) CREO retrieves predefined models & drawing 5) reads cell values from Excel and update CREO2.0 model parameters 6) regenerate the model & updates associated drawing in CREO 7) exports the drawing sheet from CREO in DXF or DWG format 8) imports the DXF or DWG into AUTOCAD 2015 at a predefined location