You can’t entmod viewports, no matter open in the editor or via odbx. Cue sad trombone. The properties exposed to activex that affect the view are nominal and incomplete (e.g. CustomScale, Direction, Target, TwistAngle etc). That said, you may be able to modify the viewport's xdata via activex (as much as a slugfest that is) which may be reflected in the viewport's view. Doubtful / untested. Wish I had the time to experiment, that would be a fun and useful pet project. An aside, you should be able to define named view entries (views collection) via activex, then mod via activex or entmake which may be helpful if/when a user opens the dwg. /thinking out loud ... [edit: fixed grammarz].