GetVehicleWithinDistance( playerid, Float:x1, Float:y1, Float:z1, Float:dist, &veh)
{
    for(new i = 1; i < MAX_VEHICLES; i++)
{
        if(GetVehicleModel(i) > 0)
{
           if(GetPlayerVehicleID(playerid) != i )
   {
            new Float:x, Float:y, Float:z;
            new Float:x2, Float:y2, Float:z2;
            GetVehiclePos(i, x, y, z);
            x2 = x1 - x; y2 = y1 - y; z2 = z1 - z;
            new Float:vDist = (x2*x2+y2*y2+z2*z2);
            if( vDist < dist)
      {
            veh = i;
            dist = vDist;
            }
            }
        }
    }
}
IsVehicleRc(vehicleid)
{
  new vid= GetVehicleModel(vehicleid);
  switch(vid)
  {
     case 441, 464, 501, 465, 449, 564, 594: return 1;
     else return 0;
  }
  return 0;
}
public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(newkeys == KEY_SECONDARY_ATTACK )
{
        if(!IsPlayerInAnyVehicle(playerid))
{
            new Float:x, Float:y, Float:z, vehicle;
            GetPlayerPos(playerid, x, y, z );
            GetVehicleWithinDistance(playerid, x, y, z, 20.0, vehicle);
            if(IsVehicleRc(vehicle))
   {
              PutPlayerInVehicle(playerid, vehicle, 0);
            }
        }
        else
{
            new vehicleID = GetPlayerVehicleID(playerid);
            if(IsVehicleRc(vehicleID) || GetVehicleModel(vehicleID) == 594)
   {
                 if(GetVehicleModel(vehicleID) != 449)
        {
           new Float:x, Float:y, Float:z;
                GetPlayerPos(playerid, x, y, z);
                SetPlayerPos(playerid, x+0.5, y, z+1.0);
              }
            }
        }
    }
    return 1;
}