+ <STRONG>slk_attroff</STRONG>, <STRONG>slk_attron</STRONG>, <STRONG>slk_clear</STRONG>, <STRONG>slk_noutrefresh</STRONG>,
+ <STRONG>slk_refresh</STRONG>, <STRONG>slk_touch</STRONG>
+ return an error if the terminal or the softkeys
+ were not initialized.
+
+ <STRONG>slk_attrset</STRONG>
+ returns an error if the terminal or the softkeys
+ were not initialized.
+
+ <STRONG>slk_attr_set</STRONG>
+ returns an error if the terminal or the softkeys
+ were not initialized, or the color pair is outside
+ the range 0..COLOR_PAIRS-1.
+
+ <STRONG>slk_color</STRONG>
+ returns an error if the terminal or the softkeys
+ were not initialized, or the color pair is outside
+ the range 0..COLOR_PAIRS-1.
+
+ <STRONG>slk_init</STRONG>
+ returns an error if the format parameter is out-
+ side the range 0..3.
+
+ <STRONG>slk_label</STRONG>
+ returns <STRONG>NULL</STRONG> on error.
+
+ <STRONG>slk_set</STRONG>
+ returns an error if the terminal or the softkeys
+ were not initialized, or the <EM>labnum</EM> parameter is
+ outside the range of label counts, or if the for-
+ mat parameter is outside the range 0..2, or if
+ memory for the labels cannot be allocated.
+
+
+</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
+ X/Open Curses documents the <EM>opts</EM> argument as reserved for
+ future use, saying that it must be null. This implementa-
+ tion uses that parameter in ABI 6 for the functions which
+ have a color-pair parameter to support extended color
+ pairs.
+
+ For functions which modify the color, e.g., <STRONG>slk_at-</STRONG>
+ <STRONG>tr_set</STRONG>, if <EM>opts</EM> is set it is treated as a pointer to <STRONG>int</STRONG>,
+ and used to set the color pair instead of the <STRONG>short</STRONG>
+ pair parameter.
+
+
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>