--- libaitio/inc/aitio.h	2011/12/12 14:45:19	1.12.2.9
+++ libaitio/inc/aitio.h	2011/12/12 15:22:19	1.12.2.10
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: aitio.h,v 1.12.2.9 2011/12/12 14:45:19 misho Exp $
+* $Id: aitio.h,v 1.12.2.10 2011/12/12 15:22:19 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -320,7 +320,7 @@ inline array_t *io_allocVars(u_int varnum);
 /*
  * io_clrVars() Clear ait_val_t elements from array
  * @vars = Variable array
- * return: size of array
+ * return: -1 error or size of array
  */
 inline int io_clrVars(array_t * __restrict vars);
 /*
@@ -329,6 +329,8 @@ inline int io_clrVars(array_t * __restrict vars);
  * return: none
  */
 inline void io_freeVars(array_t ** __restrict vars);
+
+#define io_elemVars(_vars, _n, _val)	((ait_val_t*) io_arrayElem((_vars), (_n), (_val)))
 
 /*
  * ioPromptRead() Read data from input h[0] with prompt to output h[1]