Arguments

 

display-id

   OpenVMS usage:identifier
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference

   Specifies the virtual display in which scrolling takes place. The
   display-id argument is the address of an unsigned longword that
   contains the display identifier.

   The display identifier is returned by SMG$CREATE_VIRTUAL_DISPLAY.
 

start-row

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Specifies the first row of the scrolling region. The start-row
   argument is the address of a signed longword that contains the
   starting row.

   If start-row is omitted, row 1 of the specified virtual display
   is used.
 

start-column

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Specifies the first column of the scrolling region. The start-
   column argument is the address of a signed longword that contains
   the starting column.

   If omitted, column 1 of the specified virtual display is used.
 

height

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Specifies the number of rows in the scrolling region. The height
   argument is the address of a signed longword that contains the
   number of rows.

   If omitted, this value defaults to either the height of the
   virtual scrolling region (if one has been explicitly set with
   SMG$SET_DISPLAY_SCROLL_REGION) or the height of the specified
   virtual display.

   When scrolling a portion of a virtual display that contains
   double-height, double-width (highwide) characters, it is
   recommended that you scroll the display an even number of times.
 

width

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Specifies the number of columns in the scrolling region. The
   width argument is the address of a signed longword that contains
   the number of columns.

   If omitted, this value defaults to the width of the specified
   virtual display.
 

direction

   OpenVMS usage:mask_longword
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference

   Specifies the direction to scroll. The direction argument is the
   address of a longword bit mask that contains the direction code.

   Valid values are SMG$M_UP, SMG$M_DOWN, SMG$M_RIGHT, and SMG$M_
   LEFT. SMG$M_UP is the default.
 

count

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Specifies the number of lines or columns to scroll. The count
   argument is the address of a signed longword that contains the
   number of units (lines or columns) to scroll. If omitted, one
   unit is scrolled.