Function 4402h (68-2)    IOCTL: Read from Character Device
 
    Reads a control string from a character device.
 
       On entry:      AH         44h
                      AL         02h
                      BX         Device handle
                      CX         Number of bytes to read
                      DS:DX      Data or Buffer
 
       Returns:       AX         Error code, if CF is set
 
       Error codes:   1          Device doesn't support control strings
 
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    This subfunction reads CX bytes of data from the character device's
    control channel into either DS:DX or memory pointed to by DS:DX.  How
    data is read is defined by the device driver.  Data can be read only
    if the device can process control strings.

Seealso:


 44h 
 4403h