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Determining ACP Window Size?

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The Question is:

 
Is there a way to view the window size on a volume?  I tried the f$getdvi
 lexical with the argument "ACP_WINDOW" & "WINDOW" but no luck.  I know the
 paramenter can be set with a set volume/window command.

The Answer is :

 
  There is no user-mode interface to this value, you would need to
  create inner-mode code to locate and access the Volume Control Block
  (VCB) structure associated with the particular target disk device.
 
  From within the System Dump Analyzer (SDA) tool, you can use the
  following sequence:
 
  OpenVMS Alpha:
 
    $ ANALYZE/SYSTEM
    READ SYS$LOADABLE_IMAGES:SYSDEF
    SHOW DEVICE diskname
    EXAMINE VCB+VCB$L_WINDOW
 
 
  OpenVMS VAX:
 
    $ ANALYZE/SYSTEM
    READ SYS$SYSTEM:SYSDEF
    SHOW DEVICE diskname
    EXAMINE VCB+VCB$B_WINDOW
 
 

  
     
     answer written or last revised on ( 24-OCT-2001 )
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