The function does not return anything if sucessful.
3.2
<error>
Error
An error occurred, most likely invalid parameters.
3.2
Notes
When you label a Location Object, that object will be registered with the JS API. This is particularly useful in the case of AREA objects as it will trigger eventArea<Label>() whenever a droid enters the labelled area.
Example
// you can label game objects...
var firstTruck = enumDroid(me, DROID_CONSTRUCT)[0];
addLabel(firstTruck, "my_first_truck");
// you can also register new location objects by labelling them...
var myArea = {x:10, y:11, x2:20, y2:21, type:AREA};
addLabel(myArea, "TriggerZone");
// which is useful for creating area triggers at runtime...
function eventAreaTriggerZone() {
// do stuff when area is entered
// see also: resetArea()
}