diff --git a/win/rfb_win32/SDisplay.h b/win/rfb_win32/SDisplay.h
index c1d5c1e..76ddf50 100644
--- a/win/rfb_win32/SDisplay.h
+++ b/win/rfb_win32/SDisplay.h
@@ -52,6 +52,13 @@
       virtual const char* methodName() const = 0;
     };
 
+    class QueryConnectionHandler {
+    public:
+      virtual ~QueryConnectionHandler() {}
+      virtual void queryConnection(network::Socket* sock,
+                                   const char* userName) = 0;
+    };
+
     class SDisplay : public SDesktop,
       WMMonitor::Notifier,
       Clipboard::Notifier,
@@ -65,6 +72,8 @@
 
       virtual void start(VNCServer* vs);
       virtual void stop();
+      virtual void queryConnection(network::Socket* sock,
+                                   const char* userName);
       virtual void pointerEvent(const Point& pos, int buttonmask);
       virtual void keyEvent(rdr::U32 keysym, rdr::U32 keycode, bool down);
       virtual void clientCutText(const char* str, int len);
@@ -86,6 +95,12 @@
 
       void setStatusLocation(bool* status) {statusLocation = status;}
 
+      // -=- Set handler for incoming connections
+
+      void setQueryConnectionHandler(QueryConnectionHandler* qch) {
+        queryConnectionHandler = qch;
+      }
+
       static IntParameter updateMethod;
       static BoolParameter disableLocalInputs;
       static StringParameter disconnectAction;
@@ -150,6 +165,9 @@
       // -=- Where to write the active/inactive indicator to
       bool* statusLocation;
 
+      // -=- Whom to query incoming connections
+      QueryConnectionHandler* queryConnectionHandler;
+
       unsigned ledState;
     };