VMS Help RTL Routines, SMG$, SMG$DELETE_LINE, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 display-id

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

    Identifies the virtual display from which lines are to be
    deleted. 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 line to be deleted from the virtual display.
    The start-row argument is the address of a signed longword that
    contains the number of the first line to be deleted.

 number-of-rows

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

    Specifies the number of lines to be deleted. The number-of-rows
    argument is the address of a signed longword that contains the
    number of lines to be deleted. If omitted, one line is deleted.