Forcing a screenshot - Possible?

First of all I'm sorry for probably wasting your time with such silly questions.
I've like no understanding of Warcraft 3 functions in general.
Anyways, what I'm searching for is a way to force players to take Screenshots ingame.
If you press the Print button. Wc3 takes automatically a Screenshot and saves it in your Warcraft 3 folder. Shouldn't it be possible to somehow force a screenshot via a trigger.
Like Player 1 types -ss
"Simulates pressing "Print" or directly makes a screenshot".
Could you help me out?
The Force UI KEY does it work with other keys than A-Z?
I found this list here
http://www.wc3c.net/pastebint.php?t=...b5709e06e52b58
But I've no clue what to do with it or how to have it done.
Anyways :D
Im pretty sure there is a way to force a Screenshot :D
So if somebody could help me I'd be very grateful.

- Vio

From my tests, ForceUIKey() will only check the first character in the string. For example, typing ESC (ForceUIKey("ESC")) will force the key "E". Forcing "F10" will force the key "F". So no, I don't think there is a way to do what you are trying to do (without any mods, of course).

\027

Gives me an invalid escape sequence error (pjass) or invalid argument error (regular editor syntax checker).