about zigbee application kit

Hello everyone!
I have a ZIgBee/802.15.4 application kit and exam on it.
Now i have a program that is in a peer-to-peer Neteork sample
program,i already know the other node’s NI(node identifier) is “002”.
Use the xb_getND() command,i can get the message is “MY: 0 SH: 13A200
SL: 4000BDBD DB: 3E NI: 002”.
How can i set the “002” to the destination node and control it.
For example i want to turn on or off the LED on node-“002”.

Thanks for your reply.