diff -r 71065c81b5a2 src/ov-base.h
--- a/src/ov-base.h	Sat Feb 23 21:12:37 2008 +0200
+++ b/src/ov-base.h	Sun Feb 24 18:38:58 2008 +0100
@@ -505,6 +505,9 @@
   virtual octave_value tanh (void) const;
   virtual octave_value isalnum (void) const;
   virtual octave_value isalpha (void) const;
+#ifdef isascii
+#undef isascii
+#endif
   virtual octave_value isascii (void) const;
   virtual octave_value iscntrl (void) const;
   virtual octave_value isdigit (void) const;
@@ -515,6 +518,9 @@
   virtual octave_value isspace (void) const;
   virtual octave_value isupper (void) const;
   virtual octave_value isxdigit (void) const;
+#ifdef toascii
+#undef toascii
+#endif
   virtual octave_value toascii (void) const;
   virtual octave_value tolower (void) const;
   virtual octave_value toupper (void) const;
diff -r 71065c81b5a2 src/ov-str-mat.cc
--- a/src/ov-str-mat.cc	Sat Feb 23 21:12:37 2008 +0200
+++ b/src/ov-str-mat.cc	Sun Feb 24 18:38:58 2008 +0100
@@ -797,7 +797,13 @@
 
 STRING_MAPPER (isalnum, bmap, isalnum)
 STRING_MAPPER (isalpha, bmap, isalpha)
+#ifdef _MSC_VER
+STRING_MAPPER (isascii, bmap, __isascii)
+STRING_MAPPER (toascii, dmap, __toascii)
+#else
 STRING_MAPPER (isascii, bmap, isascii)
+STRING_MAPPER (toascii, dmap, toascii)
+#endif
 STRING_MAPPER (iscntrl, bmap, iscntrl)
 STRING_MAPPER (isdigit, bmap, isdigit)
 STRING_MAPPER (isgraph, bmap, isgraph)
@@ -807,7 +813,6 @@
 STRING_MAPPER (isspace, bmap, isspace)
 STRING_MAPPER (isupper, bmap, isupper)
 STRING_MAPPER (isxdigit, bmap, isxdigit)
-STRING_MAPPER (toascii, dmap, toascii)
 TOSTRING_MAPPER (tolower, smap, tolower)
 TOSTRING_MAPPER (toupper, smap, toupper)
 
diff -r 71065c81b5a2 src/ov.h
--- a/src/ov.h	Sat Feb 23 21:12:37 2008 +0200
+++ b/src/ov.h	Sun Feb 24 18:38:58 2008 +0100
@@ -880,6 +880,14 @@
 #define MAPPER_FORWARD(F) \
   octave_value F (void) const { return rep->F (); }
 
+#ifdef isascii
+#undef isascii
+#endif
+
+#ifdef toascii
+#undef toascii
+#endif
+
   MAPPER_FORWARD (abs)
   MAPPER_FORWARD (acos)
   MAPPER_FORWARD (acosh)