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3.1.4.3 SCARD_IOCTL_ISVALIDCONTEXT (IOCTL 0x0009001C)

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Is Valid Context checks if a previously established Smart Cards for Windows context from SCARD_IOCTL_ESTABLISHCONTEXT is still valid. For this call to succeed, Context_Call.Context (for more information, see section 2.2.2.2) MUST exist in rgSCardContextList and the Smart Cards for Windows communication channel MUST still be present.

Return Values: This method sets Long_Return.ReturnCode (for more information, see section 2.2.3.3) to SCARD_S_SUCCESS on success; otherwise, it sets one of the smart card-specific errors or one of the return codes from Winerror.h. No specialized error codes are associated with this method.