diff --git a/include/wx/window.h b/include/wx/window.h
index f07c92d05d..972ef41d58 100644
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -1514,6 +1514,9 @@ public:
     virtual bool SendIdleEvents(wxIdleEvent& event);
 
     // Send wxContextMenuEvent and return true if it was processed.
+    //
+    // Note that the event may end up being sent to a different window, if this
+    // window is part of a composite control.
     bool WXSendContextMenuEvent(const wxPoint& posInScreenCoords);
 
         // get the handle of the window for the underlying window system: this
diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index 828b805ff4..0b744892fd 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -3071,9 +3071,16 @@ wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
 
 bool wxWindowBase::WXSendContextMenuEvent(const wxPoint& posInScreenCoords)
 {
-    wxContextMenuEvent evtCtx(wxEVT_CONTEXT_MENU, GetId(), posInScreenCoords);
-    evtCtx.SetEventObject(this);
-    return HandleWindowEvent(evtCtx);
+    // When the mouse click happens in a subwindow of a composite control,
+    // the user-visible event should seem to originate from the main window
+    // and, notably, use its ID and not the (usually auto-generated and so
+    // not very useful) ID of the subwindow.
+    wxWindow* const mainWin = GetMainWindowOfCompositeControl();
+
+    wxContextMenuEvent
+        evtCtx(wxEVT_CONTEXT_MENU, mainWin->GetId(), posInScreenCoords);
+    evtCtx.SetEventObject(mainWin);
+    return mainWin->HandleWindowEvent(evtCtx);
 }
 
 // methods for drawing the sizers in a visible way: this is currently only