[VC/III] How to fetch if tree near actor

[AA Shakil]

First of all, I'm not good in English. Also, beginner in VC modding.

 

Problem

I'm developing a cleo for vice city in which I need to know when the player is too near or touching a tree. How to fetch if the main actor is near or touching a tree and select the tree in a variable? 

That means when he touch a tree I need to modify or do something with the tree.