Index: Lib/ctypes/util.py
===================================================================
--- Lib/ctypes/util.py	(revision 59887)
+++ Lib/ctypes/util.py	(working copy)
@@ -5,7 +5,20 @@
 
 # find_library(name) returns the pathname of a library, or None.
 if os.name == "nt":
+    import re
+    def find_msvcrt():
+        # To access functions of the C runtime library the same dll
+        # that Python itself is linked to must be used. A not very
+        # robust but working hack is to scan the executable for the
+        # string (better would be to locate the real import table and
+        # parse that, but I'm too lazy for this now).
+        bytes = open(sys.executable, "rb").read()
+        match = re.search("msvcr([0-9]+|t)d?.dll", bytes, re.IGNORECASE)
+        return match.group(0)
+
     def find_library(name):
+        if name in ("c", "m"):
+            return find_msvcrt()
         # See MSDN for the REAL search order.
         for directory in os.environ['PATH'].split(os.pathsep):
             fname = os.path.join(directory, name)