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Quero Toolbar

Version 8

Navigation Bar and Ad Blocker project for Internet Explorer

Copyright 2004-2013 Viktor Krammer

Open source license GNU General Public License v3


Email support at


1 Requirements

2 Software components

3 Build instructions

4 Component registration

5 Registry keys


1 Requirements

  • MS Windows 2000 or higher (Windows 8 and x64 supported)
  • MS Internet Explorer 5.5 or higher (IE11 supported)
  • MS Visual Studio 2005 or higher
  • MS Windows SDK 6.1 for Windows Vista and Windows Server 2008 or higher (recommended Windows SDK 7.1 for Windows 7)
  • Windows Template Library WTL 8.0 or higher
  • Inno Setup 5.3 or higher

2 Software components

  • Quero.dll Internet Explorer add-on (BHO, IQueroBand, IQueroFilter) runs at Low IL under Windows Vista or higher (if protected mode is enabled)
  • QueroBroker.exe COM server (IQueroBroker) Quero Broker process (required for Internet Explorer 7 and higher) runs at Medium IL under Windows Vista or higher (if UAC is enabled) manages all open IE windows and its associated Quero instances provides a communication channel between Quero instances performs elevated operations
  • QueroBroker.dll Helper dll injected into IE frame processes implements keyboard and message hooks
  • Installer based on Inno Setup

3 Build instructions

  • Visual Studio 2005 solution files included

  • Build different platform versions by replacing the Build.h with the desired platform Build file

  • Build the German version by replacing Quero.rc with Quero_DE.rc

  • Building the x64 version

    copy the source files into the Quero_x64 folder

    copy the _x64 Build file to Build.h

4 Component registration

  • Register
    QueroBroker.exe /RegServer
    regsvr32 Quero.dll
  • Unregister
    regsvr32 /u Quero.dll
    QueroBroker.exe /UnregServer

5 Registry keys

  • Main settings under Windows 2000, XP
    [HKEY_CURRENT_USER\Software\Quero Toolbar]
  • Main settings under Windows 7 and Windows Vista
    [HKEY_CURRENT_USER\Software\AppDataLow\Software\Quero Toolbar]
  • Main settings under Windows 8 and Windows 10
    [HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\InternetRegistry\Software\Quero Toolbar]
  • Default search profile key
    [HKEY_USERS\.DEFAULT\Software\Quero Toolbar\Profiles]


Quero Toolbar







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