The spell Defenestrating Sphere (Sor/Wiz 4) has a duration of 1 rd./level. The spell description reads:
When you cast this spell, you create a violently swirling sphere of air. As a move action, you can make the sphere travel up to 30 feet per round and strike a creature or object you indicate as a ranged touch attack. Any creature struck by the sphere takes 3d6 points of damage from the force of its winds. Spell Compendium, p. 62
a) Does that mean the attack is part of the move action?
b) In case the opponent is denied her Dex bonus, is she eliglible to sneak attack?