[siriusmd99]

It's a good idea actually but compiler will throw you a error "already defined"

Because there is client_print already defined as native.
You can actually modify some symbols like replacing client_print with clientprint.

Something like

#define clientprint(%1, 0, %2) ColorChat(%1, GREEN, %2)

But I am not sure you can do here" any:" parameter so you can format the string inside the function call.