From 3f38468f234142038ace0202a8c0235395c54da5 Mon Sep 17 00:00:00 2001
From: Matthias Kupfer <mkupfer@reactos.org>
Date: Mon, 21 Jul 2008 15:52:52 +0000
Subject: [PATCH] avoid flicker when registering components

svn path=/trunk/; revision=34638
---
 reactos/dll/win32/syssetup/wizard.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/reactos/dll/win32/syssetup/wizard.c b/reactos/dll/win32/syssetup/wizard.c
index 58bd2182f31..8dada65e5f6 100644
--- a/reactos/dll/win32/syssetup/wizard.c
+++ b/reactos/dll/win32/syssetup/wizard.c
@@ -1813,6 +1813,7 @@ ProcessPageDlgProc(HWND hwndDlg,
 {
   PSETUPDATA SetupData;
   PREGISTRATIONNOTIFY RegistrationNotify;
+  static UINT oldActivityID = -1;
   WCHAR Title[64];
 
   /* Retrieve pointer to the global setup data */
@@ -1864,13 +1865,18 @@ ProcessPageDlgProc(HWND hwndDlg,
         {
           WCHAR Activity[64];
           RegistrationNotify = (PREGISTRATIONNOTIFY) lParam;
-          if (0 != LoadStringW(hDllInstance, RegistrationNotify->ActivityID,
+	  // update if necessary only
+	  if (oldActivityID != RegistrationNotify->ActivityID)
+          {
+            if (0 != LoadStringW(hDllInstance, RegistrationNotify->ActivityID,
                                Activity,
                                sizeof(Activity) / sizeof(Activity[0])))
             {
               SendDlgItemMessageW(hwndDlg, IDC_ACTIVITY, WM_SETTEXT,
                                   0, (LPARAM) Activity);
             }
+	    oldActivityID = RegistrationNotify->ActivityID; 
+	  }
           SendDlgItemMessageW(hwndDlg, IDC_ITEM, WM_SETTEXT, 0,
                               (LPARAM)(NULL == RegistrationNotify->CurrentItem ?
                                        L"" : RegistrationNotify->CurrentItem));