From 2af8b64f00691eaaac43e56d20ccfff2e47d2987 Mon Sep 17 00:00:00 2001
From: kichik <kichik@212acab6-be3b-0410-9dea-997c60f758d6>
Date: Fri, 24 Feb 2006 18:15:35 +0000
Subject: [PATCH] fixed bug #1400995 - MB_TOPMOST doesn't work as first
 sections' instruction

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4534 212acab6-be3b-0410-9dea-997c60f758d6
---
 Source/exehead/Ui.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Source/exehead/Ui.c b/Source/exehead/Ui.c
index b86d7ac4..201b87b2 100644
--- a/Source/exehead/Ui.c
+++ b/Source/exehead/Ui.c
@@ -1506,6 +1506,17 @@ static DWORD WINAPI install_thread(LPVOID p)
   }
 #endif
 
+  // workaround for bug #1400995
+  //
+  // for an unexplained reason, MessageBox with MB_TOPMOST
+  // will fail, if no other messages were sent from this
+  // thread to the GUI thread before it.
+  //
+  // the source of the problem couldn't be found, so a
+  // WM_NULL is sent to work around it.
+
+  NotifyCurWnd(WM_NULL);
+
   while (m_inst_sec--)
   {
 #ifdef NSIS_CONFIG_COMPONENTPAGE