Removed the CN_xxx macros since they are not used, do not correspond to
any Windows define and conflict with MFC defines.
windows.h must provide all the definitions contained in winbase.h
Some Xxx32 functions did not have the associated Xxx macro.

diff --git a/include/windows.h b/include/windows.h
index fb0043a..2a08332 100644
--- a/include/windows.h
+++ b/include/windows.h
@@ -11,7 +11,11 @@
 
 #include "wintypes.h"
 
+/* FIXME: Maybe we should try to get something from the Unix headers instead, this should be in windef.h by the way */
+#define MAX_PATH 260
+
 #ifndef DONT_INCLUDE_WINGDI
+#include "winbase.h"
 #include "wingdi.h"
 #include "winuser.h"
 #endif /* DONT_INCLUDE_WINGDI */
@@ -1164,11 +1168,6 @@
 #define MS_RING_ON          ((DWORD)0x0040)
 #define MS_RLSD_ON          ((DWORD)0x0080)
 
-
-#define CN_RECEIVE	0x0001
-#define CN_TRANSMIT	0x0002
-/*#define CN_EVENT	0x0004*/
-
 typedef struct tagDCB16
 {
     BYTE   Id;