-No errors are defined in the XSI Curses standard.
-This implementation checks for null pointers, returns ERR in that case.
-Also, the \fImv\fR routines check for error moving the cursor, returning ERR
-in that case.
-Otherwise they return OK
+No errors are defined in X/Open Curses.
+This implementation checks for null pointers, returns \fBERR\fP in that case.
+Also, the \fImv\fP routines check for error moving the cursor,
+returning \fBERR\fP in that case.
+Otherwise they return \fBOK\fP.
+.PP
+Functions prefixed with \*(``mv\*('' first perform cursor movement and
+fail if the position
+.RI ( y ,
+.IR x )
+is outside the window boundaries.