<STRONG>bkgd</STRONG>, <STRONG>wbkgd</STRONG>, and <STRONG>getbkgd</STRONG> return <STRONG>ERR</STRONG> on failure (in the case of the
last, this value is cast to <EM>chtype</EM>), but describes no failure
conditions.
<STRONG>bkgd</STRONG>, <STRONG>wbkgd</STRONG>, and <STRONG>getbkgd</STRONG> return <STRONG>ERR</STRONG> on failure (in the case of the
last, this value is cast to <EM>chtype</EM>), but describes no failure
conditions.