msctf: Implement ITfCompartment::GetValue.

dlls/msctf/compartmentmgr.c

@@ -436,9 +436,17 @@ static HRESULT WINAPI Compartment_SetValue(ITfCompartment *iface,
 static HRESULT WINAPI Compartment_GetValue(ITfCompartment *iface,
     VARIANT *pvarValue)
 {
+    HRESULT hr = S_OK;
     Compartment *This = (Compartment *)iface;
-    FIXME("STUB:(%p)\n",This);
-    return E_NOTIMPL;
+    TRACE("(%p) %p\n",This, pvarValue);
+
+    if (!pvarValue)
+        return E_INVALIDARG;
+
+    pvarValue->n1.n2.vt = VT_EMPTY;
+    if (!This->variant.n1.n2.vt == VT_EMPTY)
+        hr = VariantCopy(pvarValue,&This->variant);
+    return hr;
 }
 
 static const ITfCompartmentVtbl ITfCompartment_Vtbl ={