private void btnNewZone_Click(object sender, EventArgs e)
{
EditZonesForm editZoneForm = new EditZonesForm(world);
this.Enabled = false;
editZoneForm.Show();
editZoneForm.FormClosed += new FormClosedEventHandler(editForm_Closed);
}
private void editForm_Closed(object sender, FormClosedEventArgs e)
{
EditZonesForm editZonesForm = (EditZonesForm)sender;
ClearAllFields();
lbAccessPoints.ClearSelected();
string lastZoneEdited = editZonesForm.lastZoneEdited;
SetLastZoneEditedAsActiveZone(lastZoneEdited);
this.Enabled = true;
}