menu.Add(AK_CLOSETAB, THISBACK(ClearTab))
		    .Help("Close the current file tab");

void Ide::ClearTab()
{
	int c = tabs.GetCursor();
	if(c >= 0)
		tabs.Close(c);
}

void TabBar::LeftDown(Point p, dword keyflags)
...
			int ix = cross;
			if (!CancelClose(v) && !CancelCloseSome(vv) && ConfirmClose(v)) {
				WhenClose(v);
				WhenCloseSome(vv);
				TabClosed(v);
				Close(ix);
			}

void TabBar::ContextMenu(Bar& bar)
...
		bar.Add(tabs.GetCount() > mintabcount, t_("Close"), [=] {
			if (!CancelClose(tabs[ii].key)) {
				WhenClose(tabs[ii].key);
				TabClosed(tabs[ii].key);
				tabs.Remove(ii);
				MakeGroups();
				Repos();
				SetCursor(-1);
			}
		});