- ing a <STRONG>cchar_t</STRONG> for each wchar_t in the string, then calling <STRONG>wadd_wch</STRONG> for
- the resulting <STRONG>cchar_t</STRONG>.
+ ing a <STRONG>cchar_t</STRONG> for each <STRONG>wchar_t</STRONG> in the string, then calling <STRONG><A HREF="curs_add_wch.3x.html">wadd_wch(3x)</A></STRONG>
+ for the resulting <STRONG>cchar_t</STRONG>:
+
+ <STRONG>o</STRONG> spacing and non-spacing characters in the string are processed one
+ at a time, and
+
+ <STRONG>o</STRONG> control characters are processed as in <STRONG><A HREF="curs_addch.3x.html">waddch(3x)</A></STRONG>.