added windows version of vpcd driver

based on Fabio Ottavi's UMDF Driver for a Virtual Smart Card Reader, see
http://www.codeproject.com/Articles/134010/An-UMDF-Driver-for-a-Virtual-Smart-Card-Reader

virtualsmartcard/win32/vpcd/Queue.h

@@ -0,0 +1,37 @@
+
+#pragma once
+
+class ATL_NO_VTABLE CMyQueue :
+    public CComObjectRootEx<CComMultiThreadModel>,
+    public IQueueCallbackDeviceIoControl
+{
+public:
+    virtual ~CMyQueue();
+
+    DECLARE_NOT_AGGREGATABLE(CMyQueue)
+
+    BEGIN_COM_MAP(CMyQueue)
+        COM_INTERFACE_ENTRY(IQueueCallbackDeviceIoControl)
+    END_COM_MAP()
+
+    static HRESULT CreateInstance(__in IWDFDevice* pWdfDevice, CMyDevice* pMyDevice);
+
+protected:
+	CMyQueue();
+
+// COM Interface methods
+public:
+	int state;
+    // IQueueCallbackDeviceIoControl
+    STDMETHOD_ (void, OnDeviceIoControl)(
+        __in IWDFIoQueue*    pQueue,
+        __in IWDFIoRequest*  pRequest,
+        __in ULONG           ControlCode,
+        SIZE_T          InputBufferSizeInBytes,
+        SIZE_T          OutputBufferSizeInBytes
+        );
+
+private:
+    CMyDevice*          m_pParentDevice; // Parent device object
+};
+