The following table lists the data structures you can use to hold driver internal data. These structures are mandatory for the WDM and VxD Smart Card Driver Libraries.
| Data Structure | Description |
|---|---|
| SCARD_CARD_CAPABILITIES | Holds all information about the currently inserted smart card. |
| SCARD_READER_CAPABILITIES | Holds state information about the reader. |
| T1_DATA | Used by the smart card driver library for processing T1 I/O. |
| SCARD_VENDOR_ATTR | Holds all information about the reader. |
| SMARTCARD_EXTENSION | Used by the driver to access all the previously listed data structures, and additional information. This structure is passed to all callback functions. |
For information on how to use the smart card driver libraries see: