SCardGetStatusChange() returns unknown flag in SCARD_READERSTATE

Question

Hello,
ScardGetStatusChange() returns unknown flags in dwEventState member of SCARD_READERSTATE.
0x10000 or 0x20000.
No of them is documented. The highest documented value is 0x400.

Does anybody known what is meaning of these flags ?

Answer 1

@Peter Skvarka ,

For 0x400(SCARD_STATE_UNPOWERED), this implies that the card in the reader has not been powered up. You can refer this from winscard.h of latest Windows 10 SDK (10.0.19041.0). For 0x10000 or 0x2000, can you help confirm which scenario you will get these values?

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Update
The reader state(4 bytes) contains count(2 bytes) and state(2 bytes) as table below. So the values about 0x10000 and 0x20000 when bitwise AND with SCARD_STATE_UNAWARE is 0x0000. The Reader State is therefore 0x0000. You can refer to more details about reader state from link below:

Reader State