private void EnableDisable()
{
bool enable = listACL.SelectedItems.Count > 0;
checkPermissionAdminister.Enabled = enable;
checkPermissionCreateMailbox.Enabled = enable;
checkPermissionDeleteMailbox.Enabled = enable;
checkPermissionExpunge.Enabled = enable;
checkPermissionInsert.Enabled = enable;
checkPermissionLookup.Enabled = enable;
checkPermissionRead.Enabled = enable;
checkPermissionKeepDeletedFlag.Enabled = enable;
checkPermissionKeepOtherFlags.Enabled = enable;
checkPermissionKeepSeenFlag.Enabled = enable;
buttonSelectAll.Enabled = enable;
buttonSelectNone.Enabled = enable;
buttonDeletePermission.Enabled = enable;
if (!enable)
SelectAll(false);
}