si.nMax = total - 1;
    si.nPage = page;
    si.nPos = start;
    if (hwnd)
        SetScrollInfo (hwnd, SB_VERT, &si, TRUE);
}

Context get_ctx() {
    HDC hdc;
    if (hwnd) {
	hdc = GetDC (hwnd);
	if (hdc && pal)
	    SelectPalette (hdc, pal, FALSE);
	return hdc;
    } else

/*
 * Move `lines' lines from position `from' to position `to' in the
 * window.
 */
void optimised_move (int to, int from, int lines) {
    RECT r;
    int min, max, d;

    min = (to < from ? to : from);
    max = to + from - min;
    d = max - min;

    r.left = 0; r.right = cols * font_width;
    r.top = min * font_height; r.bottom = (max+lines) * font_height;
    ScrollWindow (hwnd, 0, (to - from) * font_height, &r, &r);
}

/*