Library /sys$common/syshlp/helplib.hlb  —  CRTL  wcsncat  Arguments
 wstr_1, wstr_2

    Pointers to null-terminated wide-character strings.

 maxchar

    The maximum number of wide characters from wstr_2 that are copied
    to wstr_1. If maxchar is 0, no characters are copied from wstr_2.
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