Sending custom packet

Hello,
I want to send custom packet with craftbukkit, just basic packet like

Packet999 add_skills_point = new Packet999("agility", int x);
Player.sendMyPacket(add_skills_point);

And i prefer to use a plugin to receive / send packets, i have look and found the following methods but it won't work (in bukkit API 1.5.1) :

((CraftPlayer)player).getHandle().playerConnection.sendPacket(packet);

Or this code but it won't work :C

If you have any idea to how to create, send and receive packet with Bukkit, i will offer you a free cookie x) !

PS : I can mod the Client, the Craftbukkit Server and create plugin.

Thanks.

(I'm french, sorry )

 

moved to plugin development.

 

First of all if you are messing with packets you should use ProtocolLib to avoid interfearance with other plugins. An example of how to send a packet is provided in the forum thread.
Second: One does not just create a new packet. One shall use the 0xFA Packet ( plugin channel ).