API Question - track player

[ndorphine]

Hello,

i am new to the world of add-on creation.
I find your tutorial and wiki very helpful.

With the help of the tutorial i try to write an addon, that can track players
that are not in guild or a friend. I tried
IsUnitInGroupSupportRange - this only seems to work if player is in a group
I wanted to use TargetUnitByName
Is it possible to show if i am near a named player?

Is there any advice or hint you can give me?

The background to this addon is, finding a person in a map.

Thanks in advance