What does 0x4 mean in the dwFlags field of a BP_REQUEST_INFO2?

Hi,

When I create a tracepoint in Visual Studio, I see a breakpoint request come through to my Debug Engine with these values:

fields : 0x903
flags : 0x6
tracepoint : Function: $FUNCTION, Thread: $TID $TNAME

flag 0x2 is defined as BP_FLAG_DONT_STOP, but what is 0x4?

Thanks,

alex