diff --git a/include/wx/msw/window.h b/include/wx/msw/window.h
index 5b41235d9f..95a9d72206 100644
--- a/include/wx/msw/window.h
+++ b/include/wx/msw/window.h
@@ -366,7 +366,21 @@ public:
     bool HandlePower(WXWPARAM wParam, WXLPARAM lParam, bool *vetoed);
 
 
-    // Window procedure
+    // The main body of common window proc for all wxWindow objects. It tries
+    // to handle the given message and returns true if it was handled (the
+    // appropriate return value is then put in result, which must be non-NULL)
+    // or false if it wasn't.
+    //
+    // This function should be overridden in any new code instead of
+    // MSWWindowProc() even if currently most of the code overrides
+    // MSWWindowProc() as it had been written before this function was added.
+    virtual bool MSWHandleMessage(WXLRESULT *result,
+                                  WXUINT message,
+                                  WXWPARAM wParam,
+                                  WXLPARAM lParam);
+
+    // Common Window procedure for all wxWindow objects: forwards to
+    // MSWHandleMessage() and MSWDefWindowProc() if the message wasn't handled.
     virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 
     // Calls an appropriate default window procedure
diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index eee4ca18ad..7535e4efeb 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -2728,7 +2728,11 @@ LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message, WPARAM w
     return rc;
 }
 
-WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
+bool
+wxWindowMSW::MSWHandleMessage(WXLRESULT *result,
+                              WXUINT message,
+                              WXWPARAM wParam,
+                              WXLPARAM lParam)
 {
     // did we process the message?
     bool processed = false;
@@ -3608,15 +3612,26 @@ WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM l
     }
 
     if ( !processed )
+        return false;
+
+    *result = rc.result;
+
+    return true;
+}
+
+WXLRESULT wxWindowMSW::MSWWindowProc(WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
+{
+    WXLRESULT result;
+    if ( !MSWHandleMessage(&result, message, wParam, lParam) )
     {
 #if wxDEBUG_LEVEL >= 2
         wxLogTrace("winmsg", wxT("Forwarding %s to DefWindowProc."),
                    wxGetMessageName(message));
 #endif // wxDEBUG_LEVEL >= 2
-        rc.result = MSWDefWindowProc(message, wParam, lParam);
+        result = MSWDefWindowProc(message, wParam, lParam);
     }
 
-    return rc.result;
+    return result;
 }
 
 // ----------------------------------------------------------------------------