diff --git a/sdk/include/psdk/msctf.idl b/sdk/include/psdk/msctf.idl
index 01e944cf5df..5ef33119fd8 100644
--- a/sdk/include/psdk/msctf.idl
+++ b/sdk/include/psdk/msctf.idl
@@ -1136,6 +1136,25 @@ interface ITfKeyTraceEventSink : IUnknown
         [in] LPARAM lParam);
 }
 
+[
+  object,
+  local,
+  uuid(ea1ea136-19df-11d7-a6d2-00065b84435c),
+  pointer_default(unique)
+]
+interface ITfUIElementSink : IUnknown
+{
+    HRESULT BeginUIElement(
+        [in] DWORD id,
+        [in, out] BOOL *show);
+
+    HRESULT UpdateUIElement(
+        [in] DWORD id);
+
+    HRESULT EndUIElement(
+        [in] DWORD id);
+}
+
 [
   object,
   local,