Repetier Protocol Example?

Hello!
I'm trying to understand the Repetier binary protocol, and there is little information about it. So far I used Gcode.cpp to conduct my research.

For example I want to send the command M119,  is this sequence : 0x01 0x00 0x77 the right binary command to send?
And also I have no idea what to send to the printer in order to connect with it. Could you please help me?