display-id

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

    Display identifier of the virtual display to which the help text
    is written. The display-id argument is the address of an unsigned
    longword that contains this virtual display identifier. Note that
    this display must be pasted and cannot be occluded or batched.

 keyboard-id

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

    Optional keyboard identifier of the virtual keyboard used for
    input. The keyboard-id argument is the address of an unsigned
    longword that contains this virtual keyboard identifier. If the
    keyboard-id parameter is not specified, prompting is disabled.

 help-topic

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    Optional help topic. The help-topic argument is the address of a
    descriptor pointing to the help topic string.

 help-library

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    Optional help library name. The help-library argument is the
    address of a descriptor pointing to the help library name. The
    default is SYS$HELP:HELPLIB.HLB.

 rendition-set

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

    Attribute specifier. The optional rendition-set argument is
    the address of a longword bit mask in which each attribute set
    causes the corresponding attribute to be set in the display. The
    following attributes can be specified using the rendition-set
    argument:

    SMG$M_BLINK     Displays blinking characters.
    SMG$M_BOLD      Displays characters in higher-than-normal
                    intensity.
    SMG$M_REVERSE   Displays characters in reverse video; that is,
                    using the opposite of the default rendition of
                    the virtual display.
    SMG$M_          Displays underlined characters.
    UNDERLINE
    SMG$M_          Specifies invisible characters; that is, the
    INVISIBLE       characters exist in the virtual display but do
                    not appear on the pasteboard.
    SMG$M_USER1     Displays user-defined attributes.
    through
    SMG$M_USER8

    The display-id argument must be specified when you use the
    rendition-set argument.

 rendition-complement

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

    Attribute complement specifier. The optional rendition-
    complement argument is the address of a longword bit mask in
    which each attribute set causes the corresponding attribute to be
    complemented in the display. All attributes that can be specified
    with the rendition-set argument can be complemented with the
    rendition-complement argument. The display-id argument must be
    specified when you use the rendition-complement argument.

    The optional arguments rendition-set and rendition-complement
    let the user control the attributes of the virtual display. The
    rendition-set argument sets certain virtual display attributes,
    while rendition-complement complements these attributes. If the
    same bit is specified in both the rendition-set and rendition-
    complement parameters, rendition-set is evaluated first, followed
    by rendition-complement. By using these two parameters together,
    the user can control each virtual display attribute in a single
    procedure call. On a single-attribute basis, the user can cause
    the following transformations:

    Set  Complement Action

    0    0          Attribute set to default
    1    0          Attribute on
    0    1          Attribute set to complement of default setting
    1    1          Attribute off