Scardtransmit error in c++

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Hi I have implemented a scardtransmit function to send a APDU command but its giving error 14. i ~~dnt~~ don't ~~knw~~ know ~~wat~~ what ~~dat~~ that means ...code is:-
all the previous functions like scardestablish context n scardconnect are working fine.
i ~~dnt~~ don't ~~knw~~ know the error.... ~~pls~~ please help..

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DWORD dwActiveProtocol, dwSendLength, dwRecvLength;
	SCARD_IO_REQUEST pioRecvPci;
	BYTE pbRecvBuffer[256];
	BYTE pbSendBuffer[] = { (BYTE)0x60,(BYTE) 0x00,(BYTE) 0x02, (BYTE)0x6C, (BYTE)0x35, (BYTE)0x3B, (BYTE)0x03 };
	dwSendLength = sizeof(pbSendBuffer);
	dwRecvLength = sizeof(pbRecvBuffer);
	long result =com(phCard, 0, pbSendBuffer, dwSendLength,&pioRecvPci, pbRecvBuffer, &dwRecvLength);
	if(result!=SCARD_S_SUCCESS){
	cout<<"unable  to transmit the command\n";
	}

if i remove the (BYTE) from pbSendBuffer then the error is 22...
help...

Posted 23-May-12 0:03am

Anil Kumar 23

Updated 23-May-12 0:08am

Mohibur Rashid

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Richard MacCutchan 23-May-12 10:11am

Whaere does the error code come from and what does the com() function do?

Anil Kumar 23 23-May-12 10:32am

oh sory.. com() function is acting as SCardTransmit function exported by winscard.dll..

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TRK3 · Answer 1 · 2012-05-23T09:33:00

SCard specific error codes are here:

http://msdn.microsoft.com/en-us/library/windows/desktop/aa374738(v=vs.85).aspx#smart_card_return_values[^]

Generic system error codes are here:

http://msdn.microsoft.com/en-us/library/ms681382(v=vs.85).aspx[^]

14 = ERROR_OUTOFMEMORY
22 = ERROR_BAD_COMMAND

I suspect that your problem has to do with the pioRecvPci structure. The second element of that structure is a length field which you aren't initializing. It should be initialized to a valid length.

Relevant documentation:

http://msdn.microsoft.com/en-us/library/windows/desktop/aa379804(v=vs.85).aspx[^]

and

http://msdn.microsoft.com/en-us/library/windows/desktop/aa379807(v=vs.85).aspx[^]