[Konstantinos]

pawn Код:

// Global:
new
    bool: First_Spawn[MAX_PLAYERS char];

// OnPlayerConnect:
First_Spawn{playerid} = true;

// OnPlayerSpawn:
if (First_Spawn{playerid})
{
    ShowPlayerDialog(playerid, Radio, DIALOG_STYLE_MSGBOX, "Would you torn off the radio.", "Yes", "No");
    First_Spawn{playerid} = false;
}