Arguments

 

display-id

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

   Identifier of the virtual display containing the viewport to be
   changed. The display-id argument is the address of an unsigned
   longword containing this identifier.
 

viewport-row-start

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

   Optional row number in the virtual display that will become row
   1 in the changed viewport. The viewport-row-start argument is
   the address of a signed longword containing the row number. If
   omitted, the present viewport-row-start value is used.
 

viewport-column-start

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

   Optional column number in the virtual display that will become
   column 1 in the changed viewport. The viewport-column-start
   argument is the address of a signed longword containing the
   column number. If omitted, the present viewport-column-start
   value is used.
 

viewport-number-rows

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

   Optional number of rows in the changed viewport. The viewport-
   number-rows argument is the address of a signed longword
   containing the number of rows. If omitted, the present viewport-
   number-rows value is used.
 

viewport-number-columns

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

   Optional number of columns in the changed viewport. The viewport-
   number-columns argument is the address of a signed longword
   containing the number of columns. If omitted, the present
   viewport-number-columns value is used.