network_send_packet(socket, buffer, size);
With this function you can send a data "packet" through the
network. The function takes the socket id to connect through
and then you must supply the buffer id which contains the
data to be sent (for more information on buffers see Reference - Buffers) and finally the
size (in bytes) of the data packet. Packets sent with this function
are formatted such that the GameMaker Studio 2 game
receiving the data can correctly "split" the packets correctly, and
the function will return the number of bytes of data sent, or a
number less than 0 if the send has failed. It is worth noting that
the final size of the data being sent that is returned by this
function will also include the GameMaker header information, which
is an additional 12 bytes.
buff = buffer_load("player_save.dat");
network_send_packet(sock, buff, buffer_get_size(buff));
The above information loads a previously saved buffer data into memory and returns the buffer id to be stored in the variable "buff". This complete buffer is then send as a packet over the network using the socket identified by the variable "sock".