wintrust: Implementation of WintrustAddActionID.
diff --git a/include/wintrust.h b/include/wintrust.h
index 2e7917d..b04e134 100644
--- a/include/wintrust.h
+++ b/include/wintrust.h
@@ -297,6 +297,7 @@
 
 #include <poppack.h>
 
+#define WT_ADD_ACTION_ID_RET_RESULT_FLAG 1
 
 #ifdef __cplusplus
 extern "C" {