Port #1220212 (os.kill for Win32) to py3k.
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 13698e7..4b19761 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -373,8 +373,9 @@
 
    .. note::
 
-      On Windows only SIGTERM is supported so far. It's an alias for
-      :meth:`terminate`.
+      On Windows, SIGTERM is an alias for :meth:`terminate`. CTRL_C_EVENT and
+      CTRL_BREAK_EVENT can be sent to processes started with a `creationflags`
+      parameter which includes `CREATE_NEW_PROCESS_GROUP`.
 
 
 .. method:: Popen.terminate()