2 Questions Concerning Triggers

[Darkness-4ever]

First, how do I check in conditions if the unit is carrying a specific item type?
Second, how do I order a unit to use a specific item?
These two areas are really annoying me to no end and I have yet to find any way at all to do either one.

 

[mrzwach]

#1: Add a behavior linked to that item type that has the hidden flag checked. Then, check if the unit has that behavior - if it does, it has the item.

Unsure about the second one. Maybe just apply the effect then decrease the charges on the item by one? :|

 

[Darkness-4ever]

For the first point, that will work.
For the second, I can't see how to do that, I haven't found any action that changes the charges on an item, not in abilities, effects, behaviors, triggers, I've looked everywhere but I think I just need another pair of eyes to look as well.