## Physical Device Driver Reference

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### PRT_QUERYDATAXFERMODE (73h) - Remarks

The query parallel port data transfer mode IOCtl informs the caller of the length of time, in milliseconds, that the parallel port device driver waits for a hardware interrupt to occur before the data transfer is canceled. It informs the caller of the length of time, in milliseconds, that the parallel port device driver waits for the entire request to complete before the data transfer is canceled. The IOCtl also informs the caller of the logical channel the parallel port device driver uses for the data transfer.