void update_skills()
{
int level = (int)LevelBox.Value;
SkillList.BeginUpdate();
SkillList.Items.Clear();
ListViewItem lvi_easy = SkillList.Items.Add("Easy");
lvi_easy.SubItems.Add(AI.GetSkillDC(Difficulty.Easy, level).ToString());
ListViewItem lvi_moderate = SkillList.Items.Add("Moderate");
lvi_moderate.SubItems.Add(AI.GetSkillDC(Difficulty.Moderate, level).ToString());
ListViewItem lvi_hard = SkillList.Items.Add("Hard");
lvi_hard.SubItems.Add(AI.GetSkillDC(Difficulty.Hard, level).ToString());
SkillList.EndUpdate();
DamageList.BeginUpdate();
DamageList.Items.Clear();
DamageList.ShowGroups = false;
ListViewItem lvi_damage = DamageList.Items.Add("Against a single target");
lvi_damage.SubItems.Add(Statistics.NormalDamage(level));
lvi_damage.Group = DamageList.Groups[0];
ListViewItem lvi_multiple = DamageList.Items.Add("Against multiple targets");
lvi_multiple.SubItems.Add(Statistics.MultipleDamage(level));
lvi_multiple.Group = DamageList.Groups[0];
DamageList.EndUpdate();
}