+</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
+ These functions were initially specified by X/Open Curses, Issue 4.
+ The System V Interface Definition, Version 4 (1995), specified
+ functions named <EM>waddwch</EM> and <EM>wechowchar</EM> (and the usual variants). These
+ were later additions to SVr4.<EM>x</EM>, not appearing in the first SVr4 (1989).
+ They differed from X/Open's <EM>wadd</EM><STRONG>_</STRONG><EM>wch</EM> and <EM>wecho</EM><STRONG>_</STRONG><EM>wchar</EM> in that they each
+ took an argument of type <EM>wchar</EM><STRONG>_</STRONG><EM>t</EM> instead of <EM>cchar</EM><STRONG>_</STRONG><EM>t</EM>.
+
+