## MMPM/2 Device Driver Reference

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### E_DCB

This structure contains device-specific information. It is used at stream creation by the application media control device to deliver device-specific information to the source or target stream handlers.

    typedef struct _E_DCB {

      ULONG     ulDCBLen;                 /*  Length of structure. */

      SZ        szDevName[MAX_SPI_NAME];  /*  Device driver name. */

      ULONG     ulSysFileNum;             /*  File handle number. */

    } E_DCB;

    typedef   E _ DCB   FAR   * PE _ DCB ;