cch (USHORT)

      Number of characters in the queue.

      Binary integer with the number of characters received/to be transmitted in the physical device driver receive/transmit queue. This is a memory buffer between the memory pointed to by the READ/WRITE request packet and the receive/transmit hardware for this COM device.

      Note: The behavior of data movement between the READ/WRITE request and the receive/transmit queue can change with each release of the physical device driver. Applications should not be dependent on this information.


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