diff --git a/UsbDk/WdfRequest.h b/UsbDk/WdfRequest.h
index 8827f53..214efc4 100644
--- a/UsbDk/WdfRequest.h
+++ b/UsbDk/WdfRequest.h
@@ -23,6 +23,11 @@
 
 #pragma once
 
+using WDF_REQUEST_CONTEXT = struct {};
+using PWDF_REQUEST_CONTEXT = WDF_REQUEST_CONTEXT*;
+
+WDF_DECLARE_CONTEXT_TYPE_WITH_NAME(WDF_REQUEST_CONTEXT, WdfRequestGetContext);
+
 class CWdfRequest
 {
 public:
@@ -109,6 +114,9 @@ public:
         return Request;
     }
 
+    PWDF_REQUEST_CONTEXT Context() const
+    { return WdfRequestGetContext(m_Request); }
+
     operator WDFREQUEST() const
     { return m_Request; }