i'm doing a surprise attack special action, and i want this working like the one in UO:SE.

-> you select the action
-> you go hidden
-> attack the target (closed combat only)
-> then increase damage.

I NEED the character beeing able to attck while hidden to do that, EVERTYHING is done, but when i go hidden and try to attack (2 click in the target, while in war mode, closer to the target), nothing happens,

I have to leave hidden mode so i can do the first attack.

i've hooked the combat and, as i've said, everthing is prepared, just need to do that, beeing able to attack while hidden.

how can I do that?

Use attackhook and packet hook for attack.
In packethook chek if man in hide.
in http://uokings.ru whe have thief attack from hide )