FXBACKQ
if ((fxpp->fx_flags & (FXBACKQ)) == FXBACKQ) {
fxpp->fx_flags &= ~FXBACKQ;
fxpp->fx_flags &= ~FXBACKQ;
fxpp->fx_flags |= FXBACKQ;
fxpp->fx_flags &= ~FXBACKQ;
fxpp->fx_flags &= ~FXBACKQ;
fxpp->fx_flags |= FXBACKQ;
fxpp->fx_flags |= FXBACKQ;
cfxpp->fx_flags = pfxpp->fx_flags & ~(FXBACKQ);