IPDF_SELECT_SRC
flags &= ~IPDF_SELECT_SRC;
flags |= IPDF_SELECT_SRC;
flags &= ~IPDF_SELECT_SRC;
flags |= IPDF_SELECT_SRC;
if (flags & IPDF_SELECT_SRC)
if (flags & IPDF_SELECT_SRC) {
if (flags & IPDF_SELECT_SRC) {
IPDF_SELECT_SRC | IPDF_UNIQUE_DCE;