Opcodes doubt

[viniciusturko]

I'm making a system that must add a simple storage on the player who clicks the button. I've already installed opcodes on sources but I'm not understandind the function : doSendPlayerExtendedOpcode(cid, opcode, buffer)...

In this function, what does "opcode" means? And how do I link my button to the player? Could you give me a simple adding storage example?
Thank you.

 

[zakius]

opcode is probably header of "message" that makes receiver know what to do with "buffer"