The Move Virtual Display routine relocates a virtual display on a
    pasteboard and preserves the pasting order.
    Format
      SMG$MOVE_VIRTUAL_DISPLAY  display-id ,pasteboard-id
                                ,pasteboard-row ,pasteboard-column
                                [,top-display-id]
1 – Returns
    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value
2 – Arguments
 display-id
    OpenVMS usage:identifier
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Specifies the virtual display to be moved. The display-id
    argument is the address of an unsigned longword that contains
    the display identifier.
    The display identifier is returned by SMG$CREATE_VIRTUAL_DISPLAY.
 pasteboard-id
    OpenVMS usage:identifier
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Specifies the pasteboard on which the movement is to take place.
    The pasteboard-id argument is the address of an unsigned longword
    that contains the pasteboard identifier.
    The pasteboard identifier is returned by SMG$CREATE_PASTEBOARD.
 pasteboard-row
    OpenVMS usage:longword_signed
    type:         longword (signed)
    access:       read only
    mechanism:    by reference
    Specifies the row of the pasteboard that is to contain row
    1 of the new location of the specified virtual display. The
    pasteboard-row argument is the address of a signed longword that
    contains the row number.
 pasteboard-column
    OpenVMS usage:longword_signed
    type:         longword (signed)
    access:       read only
    mechanism:    by reference
    Specifies the column of the pasteboard that is to contain column
    1 of the specified virtual display. The pasteboard-column
    argument is the address of a signed longword that contains the
    column number.
 top-display-id
    OpenVMS usage:identifier
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Identifier of the virtual display under which the moving display-
    id will be pasted. The top-display-id argument is the address
    of an unsigned longword containing the specified virtual display
    identifier. Note that the use of the top-display-id argument
    is only valid when the virtual display specified by display-id
    is not currently pasted and the virtual display specified by
    top-display-id is pasted.