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 ;