Lock and Unlock triggers on maps...

Hey I was wondering is there anyway to unlock the triggers of some maps that have them somehow locked. Also how do i lock my triggers so that others cant open up and change my maps that I make. This is a warcraft 3 question by the way. Please someone help.

Haha, so you wanna be able to open maps locked by others, but you don't want others to open your locked maps?

Seriously, there are several map protectors out there (ExtProtect, HeavyLocker, the Map utilities ...) which can be used to protect maps. See the important threads thread for download links.
But you can't unprotect maps, that's the point of map protectors. Of course, there are ways to get the desired information out of a protected map for professionals but I suggest you rather ask the author for a unprotected copy of the map.