[BlackAtom]

You must use the ZCMD (Click Here)
And below there is how the code must looks like:

pawn Код:

#include <a_samp>
#include <zcmd>

public OnPlayerCommandPerformed(playerid, cmdtext[], success)
{
if(success == 0)
SendClientMessage(playerid, 0xFF0000FF, "That command does not exist. Use /help or /commands..");
return 1;
}