function gpsToAddress(gpsX, gpsY) {
var coords = new daum.maps.LatLng(gpsX, gpsY);
geocoder.coord2detailaddr(coords, CallbackA)}

private void f_ret_gpstoaddress(double v_gps_x, double v_gps_y,out string v_address)
    {
        object[] args = { "gpsToAddress(" + v_gps_x + "," + v_gps_y + ");" };
        v_address = (string)webBrowser1.Document.InvokeScript("eval", args);
        return;
    }

    private void button3_Click(object sender, EventArgs e)
    {
        f_ret_gpstoaddress(37.353933, 127.944739, out v_address);
        MessageBox.Show(v_address);
    }