How to set zero flag

Question

LONG WINAPI MyUnhandledExceptionFilter(PEXCEPTION_POINTERS p)
{

    if(p->ExceptionRecord->ExceptionCode==EXCEPTION_ACCESS_VIOLATION){
        if(p->ContextRecord->Eip==6F3A15FD){
            p->ContextRecord->EFlags
        }

i want my exception handler to set zero flag if exception occured in a specified address ;) how do i do it p->ContextRecord->EFlags|= ??

also if i just give EXCEPTION_CONTINUE_EXECUTION after access violation will it work ? :D and, do i have to inc the EIP or it will fall on next instruction ?

Answer 1

ZF is bit 6 of EFLAGS , so EFlags |= 1 << 6;

Download Intel's or AMD's CPU manual. You'll find all this info there.