private void cmd_city_Click(object sender, EventArgs e)
{
if (cf == null)
{
cf = new CityForm(tm, (int)num_selx.Value, (int)num_sely.Value);
cf.FormClosed += cityForm_Close;
cf.Show();
}
else
cf.selTile((int)num_selx.Value, (int)num_sely.Value);
}
private void cityForm_Close(object o, FormClosedEventArgs e)
{
cf = null;
}