[Patrick]

Created this simple function for you, this will send a message to the players who's in range, that you have set.

Code

pawn Код:

stock SendNearByMessage(playerid, color, Float:radius, const message[])
{
    new 
        Float:Position[ 3 ], i = 0
    ;

    GetPlayerPos( playerid, Position[ 0 ], Position[ 1 ], Position[ 2 ]);
    while(i < MAX_PLAYERS)
    {
        if(!IsPlayerConnected(playerid)) continue;

        if(IsPlayerInRangeOfPoint(i, radius, Position[ 0 ], Position[ 1 ], Position[ 2 ]))
        {
            SendClientMessage(i, color, message); return true;
        }
        i++;
    }
    return false;
}

Example of Usage

pawn Код:

public OnPlayerConnect(playerid)
{
    return SendNearByMessage(playerid, -1, 20.0, "Message Here");
}