SIM卡(Subscriber Identity Module，用户识别模块)是一张符合GSM规范的“智能卡”，符合ISO7816标准(接触式集成电路IC卡的规定)和ETSI(欧洲电信标准委员会)的GSM11.11标准，其并在移动用户认证和移动商务中扮演重要的角色。-lReturn = SCardEstablishContext(SCARD_SCOPE_USER,NULL,NULL,&m_hContext)

lReturn = SCardListReaders(m_hContext, NULL, (LPTSTR)mszReaders, &dwLen)

lReturn = SCardConnect( m_hContext,pReaderName,SCARD_SHARE_EXCLUSIVE,SCARD_PROTOCOL_T0,&m_hCardHandle,&m_dwAP )

lReturn = SCardTransmit(m_hCardHandle, SCARD_PCI_T0, this->m_command, this->m_cdwCommand, NULL, this->m_response, &m_cdwResponse)