Arguments

 

display-id

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

   Specifies the virtual display to be erased. 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 row at which the erase operation begins. The start-
   row argument is the address of a signed longword that contains
   the number of the row at which the erasure begins.

   If the start-row argument is not specified, start-column is also
   ignored and the entire virtual display is erased. If you do not
   specify start-row and start-column, then end-row and end-column
   are ignored and the entire virtual display is erased.
 

start-column

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

   Specifies the column at which the erase operation begins. The
   start-column argument is the address of a signed longword that
   contains the number of the column at which the erasure begins.

   If the start-column argument is not specified, start-row is also
   ignored and the entire virtual display is erased. If you do not
   specify start-row and start-column, then end-row and end-column
   are ignored and the entire virtual display is erased.
 

end-row

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

   Specifies the row at which the erase operation ends; that is, the
   last row to be erased. The end-row argument is the address of a
   signed longword that contains the number of the last row to be
   erased.

   If the end-row argument is not specified, end-column is also
   ignored and all remaining rows in the display are erased.
 

end-column

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

   Specifies the column at which the erase operation ends; that
   is, the last column to be erased. The end-column argument is the
   address of a signed longword that contains the number of the last
   column to be erased.

   If the end-column argument is not specified, end-row is also
   ignored and all remaining columns in the display are erased.