Library /sys$common/syshlp/SDA.HLB  —  Extension Routines, Routines  SDA$DISPLAY_HELP, Arguments
 library

    OpenVMS usage char_string
    type          character string
    access        read only
    mechanism     by reference
    Address of library filespec. Specify as zero-terminated ASCII
    string.

 topic

    OpenVMS usage char_string
    type          character string
    access        read only
    mechanism     by reference
    Address of topic name. Specify as zero-terminated ASCII string.
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