shell32: Implement IShellFolderView::QuerySupport no-op method.

dlls/shell32/shlview.c

@@ -3188,8 +3188,8 @@ static HRESULT WINAPI IShellFolderView_fnQuerySupport(
     UINT *support)
 {
     IShellViewImpl *This = impl_from_IShellFolderView(iface);
-    FIXME("(%p)->(%p) stub\n", This, support);
-    return E_NOTIMPL;
+    TRACE("(%p)->(%p)\n", This, support);
+    return S_OK;
 }
 
 static HRESULT WINAPI IShellFolderView_fnSetAutomationObject(

dlls/shell32/tests/shlview.c

@@ -547,6 +547,7 @@ static void test_IShellFolderView(void)
     IShellFolderView *folderview;
     IShellFolder *desktop;
     IShellView *view;
+    UINT i;
     HRESULT hr;
 
     hr = SHGetDesktopFolder(&desktop);
@@ -572,6 +573,14 @@ static void test_IShellFolderView(void)
     hr = IShellFolderView_SetRedraw(folderview, TRUE);
     ok(hr == S_OK, "got (0x%08x)\n", hr);
 
+    /* ::QuerySupport */
+    hr = IShellFolderView_QuerySupport(folderview, NULL);
+    ok(hr == S_OK, "got (0x%08x)\n", hr);
+    i = 0xdeadbeef;
+    hr = IShellFolderView_QuerySupport(folderview, &i);
+    ok(hr == S_OK, "got (0x%08x)\n", hr);
+    ok(i == 0xdeadbeef, "got %d\n", i);
+
     IShellFolderView_Release(folderview);
 
     IShellView_Release(view);