From 5816f9e2585822f7b6140fddc405d30f2a4b381d Mon Sep 17 00:00:00 2001
From: Sean Hall <r.sean.hall@gmail.com>
Date: Thu, 30 Jul 2020 12:23:11 -0600
Subject: WIXFEAT:5843 Use MSFTEDIT_CLASS for Rich Edit controls when
 available.

---
 src/dutil/thmutil.cpp | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/dutil/thmutil.cpp b/src/dutil/thmutil.cpp
index 046bdc32..b9335469 100644
--- a/src/dutil/thmutil.cpp
+++ b/src/dutil/thmutil.cpp
@@ -47,6 +47,7 @@ static ULONG_PTR vgdiToken = 0;
 static ULONG_PTR vgdiHookToken = 0;
 static HMODULE vhHyperlinkRegisteredModule = NULL;
 static HMODULE vhPanelRegisteredModule = NULL;
+static HMODULE vhModuleMsftEdit = NULL;
 static HMODULE vhModuleRichEd = NULL;
 static HCURSOR vhCursorHand = NULL;
 
@@ -454,6 +455,12 @@ LExit:
 
 DAPI_(void) ThemeUninitialize()
 {
+    if (vhModuleMsftEdit)
+    {
+        ::FreeLibrary(vhModuleMsftEdit);
+        vhModuleMsftEdit = NULL;
+    }
+
     if (vhModuleRichEd)
     {
         ::FreeLibrary(vhModuleRichEd);
@@ -5049,12 +5056,17 @@ static HRESULT LoadControls(
             break;
 
         case THEME_CONTROL_TYPE_RICHEDIT:
-            if (!vhModuleRichEd)
+            if (!vhModuleMsftEdit && !vhModuleRichEd)
             {
-                hr = LoadSystemLibrary(L"Riched20.dll", &vhModuleRichEd);
-                ThmExitOnFailure(hr, "Failed to load Rich Edit control library.");
+                hr = LoadSystemLibrary(L"Msftedit.dll", &vhModuleMsftEdit);
+                if (FAILED(hr))
+                {
+                    hr = LoadSystemLibrary(L"Riched20.dll", &vhModuleRichEd);
+                    ThmExitOnFailure(hr, "Failed to load Rich Edit control library.");
+                }
             }
-            wzWindowClass = RICHEDIT_CLASSW;
+
+            wzWindowClass = vhModuleMsftEdit ? MSFTEDIT_CLASS : RICHEDIT_CLASSW;
             dwWindowBits |= ES_AUTOVSCROLL | ES_MULTILINE | WS_VSCROLL | ES_READONLY;
             break;
 
-- 
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