diff --git a/include/olectl.h b/include/olectl.h
index 9c02ca5..73dd1aa 100644
--- a/include/olectl.h
+++ b/include/olectl.h
@@ -4,6 +4,11 @@
 #include "windef.h"
 #include "ocidl.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 
 /*
  * Ole Control Interfaces
@@ -256,6 +261,13 @@
 #define CONNECT_E_CANNOTCONNECT     (CONNECT_E_FIRST+2)
 #define CONNECT_E_OVERRIDDEN        (CONNECT_E_FIRST+3)
 
+#define SELFREG_E_FIRST             MAKE_SCODE(SEVERITY_ERROR,   FACILITY_ITF, 0x0200)
+#define SELFREG_E_LAST              MAKE_SCODE(SEVERITY_ERROR,   FACILITY_ITF, 0x020F)
+#define SELFREG_S_FIRST             MAKE_SCODE(SEVERITY_SUCCESS, FACILITY_ITF, 0x0200)
+#define SELFREG_S_LAST              MAKE_SCODE(SEVERITY_SUCCESS, FACILITY_ITF, 0x020F)
+#define SELFREG_E_TYPELIB           (SELFREG_E_FIRST+0)
+#define SELFREG_E_CLASS             (SELFREG_E_FIRST+1)
+
 #ifndef FACILITY_CONTROL
 #define FACILITY_CONTROL 0xa
 #endif
@@ -315,6 +327,11 @@
 
 #define PERPROP_E_NOPAGEAVAILABLE   (PERPROP_E_FIRST+0)
 
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /*  __WINE_OLECTL_H */