© 2010 Autodesk
Introduction to Revit 2011 API
Element Modification
Element Level – Parameter
§Change a parameter of an element (e.g., a wall and a door) 
<VB.NET>
aWall.Parameter(BuiltInParameter.WALL_TOP_OFFSET).Set(14.0)
aWall.Parameter(BuiltInParameter.ALL_MODEL_INSTANCE_COMMENTS).Set( _
     "Modified by API") 
</VB.NET>