Index: App/Common.h
===================================================================
diff -u -r38ff7a6fbf82b86ab1bac3b7b24c4ea33d5419f9 -r40a959e1341c8964f872df462ac3a2d874e3b0b3
--- App/Common.h	(.../Common.h)	(revision 38ff7a6fbf82b86ab1bac3b7b24c4ea33d5419f9)
+++ App/Common.h	(.../Common.h)	(revision 40a959e1341c8964f872df462ac3a2d874e3b0b3)
@@ -64,13 +64,25 @@
 
 // **** Common Definitions ****
 
-#define NEARLY_ZERO              0.00001
+#define NEARLY_ZERO                     0.00001
+#define MASK_OFF_MSB                    0x00FF
+#define MASK_OFF_LSB                    0xFF00
+#define MASK_OFF_MSW                    0x0000FFFF
+#define MASK_OFF_LSW                    0xFFFF0000
+#define SHIFT_BITS_IN_BYTE              8
+#define SHIFT_BITS_IN_WORD              16
 
-#define CAP(v,u)                 ((v) > (u) ? (u) : (v))
-#define RANGE(v,l,u)             ((v) > (u) ? (u) : ((v) < (l) ? (l) : (v)))
-#define INC_WRAP(v,l,u)          ((v) == (u) ? (l) : ((v)+1))
-#define MAX(a,b)                 ((a) < (b) ? (b) : (a))
-#define MIN(a,b)                 ((a) > (b) ? (b) : (a))
+#define CAP(v,u)                        ((v) > (u) ? (u) : (v))
+#define RANGE(v,l,u)                    ((v) > (u) ? (u) : ((v) < (l) ? (l) : (v)))
+#define INC_WRAP(v,l,u)                 ((v) == (u) ? (l) : ((v)+1))
+#define MAX(a,b)                        ((a) < (b) ? (b) : (a))
+#define MIN(a,b)                        ((a) > (b) ? (b) : (a))
+#define GET_LSB_OF_WORD(w)              ((U08)((w) & MASK_OFF_MSB))
+#define GET_MSB_OF_WORD(w)              ((U08)(((w) >> SHIFT_BITS_IN_BYTE) & MASK_OFF_MSB))
+#define GET_LSW_OF_LONG(l)              ((U16)((l) & MASK_OFF_MSW))
+#define GET_MSW_OF_LONG(l)              ((U16)(((l) >> SHIFT_BITS_IN_WORD) & MASK_OFF_MSW))
+#define MAKE_WORD_OF_BYTES(h,l)         ((((U16)(h) << SHIFT_BITS_IN_BYTE) & MASK_OFF_LSB) | ((U16)(l) & MASK_OFF_MSB))
+#define MAKE_LONG_OF_WORDS(h,l)         ((((U32)(h) << SHIFT_BITS_IN_WORD) & MASK_OFF_LSW) | ((U32)(l) & MASK_OFF_MSW))
 
 // **** Script Support Definitions ****