Helper method FindEnumWithItem will look into namespaces and classes too now.

src/AST/Namespace.cs

@@ -348,7 +348,12 @@ namespace CppSharp.AST
 
         public Enumeration FindEnumWithItem(string name)
         {
-            return Enums.Find(e => e.ItemsByName.ContainsKey(name));
+            var result = Enums.Find(e => e.ItemsByName.ContainsKey(name));
+            if (result == null)
+                result = Namespaces.Select(ns => ns.FindEnumWithItem(name)).FirstOrDefault();
+            if (result == null)
+                result = Classes.Select(c => c.FindEnumWithItem(name)).FirstOrDefault();
+            return result;
         }
 
         public virtual IEnumerable<Function> FindOperator(CXXOperatorKind kind)