diff --git a/src/UserData/UserDataCollections/UserDataCollectionIterator.cpp b/src/UserData/UserDataCollections/UserDataCollectionIterator.cpp
index 29bc7a0..8ebc926 100644
--- a/src/UserData/UserDataCollections/UserDataCollectionIterator.cpp
+++ b/src/UserData/UserDataCollections/UserDataCollectionIterator.cpp
@@ -1 +1,11 @@
 #include "UserDataCollectionIterator.hpp"
+
+namespace Porygon::UserData{
+    extern "C"{
+    UserDataCollectionIterator* CreateCollectionIterator(const Evaluation::EvalValue* (*getCurrent)(),
+                                                         const Evaluation::EvalValue* (*moveNext)(),
+                                                         const Evaluation::EvalValue* (*reset)()){
+        return new UserDataCollectionIterator(getCurrent, moveNext, reset);
+    }
+    }
+}
\ No newline at end of file
diff --git a/src/UserData/UserDataCollections/UserDataCollectionIterator.hpp b/src/UserData/UserDataCollections/UserDataCollectionIterator.hpp
index 4799dcd..f46aa16 100644
--- a/src/UserData/UserDataCollections/UserDataCollectionIterator.hpp
+++ b/src/UserData/UserDataCollections/UserDataCollectionIterator.hpp
@@ -21,7 +21,7 @@ namespace Porygon::UserData{
             return _getCurrent();
         }
         bool MoveNext() final{
-            _moveNext();
+            return _moveNext();
         }
         void Reset() final{
             _reset();
diff --git a/src/UserData/UserDataCollections/UserDataCollectionRangeIterator.cpp b/src/UserData/UserDataCollections/UserDataCollectionRangeIterator.cpp
index e2815fa..1e4e785 100644
--- a/src/UserData/UserDataCollections/UserDataCollectionRangeIterator.cpp
+++ b/src/UserData/UserDataCollections/UserDataCollectionRangeIterator.cpp
@@ -1 +1,9 @@
 #include "UserDataCollectionRangeIterator.hpp"
+
+namespace Porygon::UserData{
+extern "C"{
+    UserDataCollectionRangeIterator* CreateCollectionRangeIterator(size_t start, size_t end){
+        return new UserDataCollectionRangeIterator(start, end);
+    }
+}
+}
\ No newline at end of file