diff --git a/UsbDk/ControlDevice.cpp b/UsbDk/ControlDevice.cpp
index 424ca26..abf0d6a 100644
--- a/UsbDk/ControlDevice.cpp
+++ b/UsbDk/ControlDevice.cpp
@@ -83,9 +83,10 @@ void CUsbDkControlDeviceQueue::DeviceControl(WDFQUEUE Queue,
 void CUsbDkControlDevice::DumpAllChildren()
 {
     m_FilterDevices.ForEach([](CUsbDkFilterDevice *Filter)
-                            {
-                                Filter->EnumerateChildren([](CUsbDkChildDevice *Child){ Child->Dump(); });
-                            });
+    {
+        Filter->EnumerateChildren([](CUsbDkChildDevice *Child){ Child->Dump(); return true; });
+        return true;
+    });
 }
 
 NTSTATUS CUsbDkControlDevice::Create(WDFDRIVER Driver)
diff --git a/UsbDk/FilterDevice.cpp b/UsbDk/FilterDevice.cpp
index 15d8e18..2157277 100644
--- a/UsbDk/FilterDevice.cpp
+++ b/UsbDk/FilterDevice.cpp
@@ -124,7 +124,7 @@ UsbDkClonePdo(WDFDEVICE ParentDevice)
 
 void CUsbDkFilterDevice::ClearChildrenList()
 {
-    m_ChildDevices.ForEachDetached([] (CUsbDkChildDevice* Child) { delete Child; });
+    m_ChildDevices.ForEachDetached([](CUsbDkChildDevice* Child) { delete Child; return true; });
 }
 
 void CUsbDkFilterDevice::QDRPostProcessWi()
diff --git a/UsbDk/FilterDevice.h b/UsbDk/FilterDevice.h
index a207b74..e4c567e 100644
--- a/UsbDk/FilterDevice.h
+++ b/UsbDk/FilterDevice.h
@@ -29,8 +29,8 @@ public:
         , m_InstanceID(InstanceID)
     {}
 
-    PCWCHAR DeviceID() { m_DeviceID->begin(); }
-    PCWCHAR InstanceID() { m_InstanceID->begin(); }
+     PCWCHAR DeviceID() { return *m_DeviceID->begin(); }
+     PCWCHAR InstanceID() { return *m_InstanceID->begin(); }
 
     void Dump();
 
@@ -70,6 +70,9 @@ public:
     static CUsbDkFilterDevice *GetByListEntry(PLIST_ENTRY entry)
     { return static_cast<CUsbDkFilterDevice*>(CONTAINING_RECORD(entry, CUsbDkFilterDevice, m_ListEntry)); }
 
+    ULONG GetChildrenCount()
+    { return m_ChildDevices.GetCount(); }
+
 private:
     static void ContextCleanup(_In_ WDFOBJECT DeviceObject);
 
@@ -94,7 +97,7 @@ private:
     PDEVICE_OBJECT m_ClonedPdo = nullptr;
     CUsbDkControlDevice *m_ControlDevice = nullptr;
 
-    CWdmList<CUsbDkChildDevice, CLockedAccess, CNonCountingObject> m_ChildDevices;
+    CWdmList<CUsbDkChildDevice, CLockedAccess, CCountingObject> m_ChildDevices;
 
     LIST_ENTRY m_ListEntry;