Function 440Bh          Set Sharing Retry Count                      DOS 3.1+

    Sets the number of times DOS retries a disk operation after a
    failure caused by a file-sharing operation. When the number of
    retries is reached without success, DOS returns an error value to
    the program that requested the disk operation.

        Entry   AX = 440Bh
                CX = No. of times to execute delay loop between retries
                DX = No. of times to retry file operation

        Return  AX = Error code, if CF is set
                     | 01h Invalid function

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    This function returns an error value of 1 (invalid function) if
    file sharing is not active (SHARE.EXE has not been loaded).

    The pause time depends on the computer's clock speed. The default
    sharing retry count is 3; the default number of times between
    retries is 1. If a program changes the retry count or pause value,
    it should restore the default values before terminating.