// 8 december 2014

static void addColumn(struct table *t, WPARAM wParam, LPARAM lParam)
{
	t->nColumns++;
	t->columnTypes = tableRealloc(t->columnTypes, t->nColumns * sizeof (int), "adding the new column type to the current Table's list of column types");
	t->columnTypes[t->nColumns - 1] = (int) wParam;
	// TODO make a panicNoErrCode() or panicArg() for this
	if (t->columnTypes[t->nColumns - 1] >= nTableColumnTypes)
		panic("invalid column type passed to tableAddColumn");
	headerAddColumn(t, (WCHAR *) lParam);
	recomputeHScroll(t);
}

HANDLER(apiHandlers)
{
	switch (uMsg) {
	case WM_SETFONT:
		// don't free the old font; see http://blogs.msdn.com/b/oldnewthing/archive/2008/09/12/8945692.aspx
		t->font = (HFONT) wParam;
		SendMessageW(t->header, WM_SETFONT, wParam, lParam);
		// TODO reposition header?
		// TODO how to properly handle LOWORD(lParam) != FALSE?
		*lResult = 0;
		return TRUE;
	case WM_GETFONT:
		*lResult = (LRESULT) (t->font);
		return TRUE;
	case tableAddColumn:
		addColumn(t, wParam, lParam);
		*lResult = 0;
		return TRUE;
	}
	return FALSE;
}