-These functions are described in the XSI Curses standard, Issue 4. The
-standard specifies that they return \fBERR\fR on failure, but specifies no
-error conditions.
+These functions are described in the XSI Curses standard, Issue 4.
+.PP
+The SVr4.0 manual says that these functions could return
+\*(``or a non-negative integer if \fB\%immedok\fP is set\*('',
+referring to the return-value of \fBwrefresh\fP.
+In that implementation, \fBwrefresh\fP would return a count of
+the number of characters written to the terminal.