## Physical Device Driver Reference

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### ASYNC_GETINQUECOUNT (68h) - Query Number of Characters in Receive Queue

Category:
IOCTL_ASYNC (01h)
Function:
ASYNC_GETINQUECOUNT (68h)
Description:
Query Number of Characters in Receive Queue

Select an item:

    Description
    Parameter Packet Format
    Data Packet Format
    Returns
    Remarks

Returns the number of characters in the receive queue.