BT_BIW32
((BT_WIM32((bitmap), (bitindex)) & BT_BIW32(bitindex)) ? 1 : 0)
{ BT_WIM32((bitmap), (bitindex)) |= BT_BIW32(bitindex); }
{ BT_WIM32((bitmap), (bitindex)) &= ~BT_BIW32(bitindex); }