INTRODUCTION
-------------------
This document details how to add an external module, such as a tutorial, to
OOBE.  The information here is based on the mouse tutorial in ME OOBE.

Goals for adding external modules:
* Look and feel remains the same
* OOBE navigation system is used
* External module can be developed and tested with little help from OOBE
  development

TEMPLATES
-----------------
To address all three of these issues a set of template HTML and script files
have been developed. These can be found in
%SDXROOT%\ADMIN\NTSETUP\OOBE\HTML\TEMPLATE: 
    * external.htm is the template for HTML files
    * external.js for script modules
    * testshel.htm is the OOBE shell to use for testing

  %SDXROOT%\ADMIN\NTSETUP\OOBE\HTML
    |
    |-- mymodule.js
    |
    |-- TEMPLATES
          |
          |-- testshel.htm
          |-- external.htm
          |-- external.js

There can be as many HTML pages as are required.  There should be exactly on
script module and one test shell.

When working with these templates, replace _MODULE_ with the name of
your module and _MODULEDIR_ with the name of the directory
containing your modules HTML files.

ADDING FILES TO THE NT SOURCE TREE
------------------------------------
HTML pages should be added to a subdirectory of
%SDXROOT%\ADMIN\NTSETUP\OOBE\HTML\HTML.  Images should be in an IMAGES
subdirectory below this directory.  Script modules should be added to
%SDXROOT%\ADMIN\NTSETUP\OOBE\HTML.

  %SDXROOT%\ADMIN\NTSETUP\OOBE\HTML
    |
    |-- mymod.js
    |
    |-- HTML
          |
          |-- MYMODULE
                |
                |-- mymod_a.htm
                |-- mymod_b.htm
                |--   ...
                |-- mymod_n.htm
                |
                |-- IMAGES
                      |
                      |-- mymod.jpg

FILE NAMING
-----------------
The name of your module subdirectory, the first page of your module, and your
script file should be the same as the name of your module. For example, if your
module is named MyMod, then your module subdirectory would be named MyMod, the
first page of the module should be named MyMod.htm and your scripts should be
in MyMod.js.  This will allow the shell scripts to find your first page and
scripts files.  Other files may be named as you wish. All files should have 8.3
names.

VARIABLE AND FUNCTION NAMING
--------------------------------
Since your module will be dropped into a public name space it is a good idea to
prepend all global variable and function names with the name of your module.

TEST INSTALLATION
-----------------
For testing purposes:
* copy the test shell to %windir%\system32\oobe\msobshel.htm.  This replaces
  the real OOBE shell with one that references your module.
* copy your script file to %windir%\system32\oobe.
* copy your HTML files to %windir%\system32\oobe\html\MyMod
* copy your image files to %windir%\system32\oobe\html\MyMod\images

  %WINDIR%\SYSTEM32\OOBE
    |
    |-- msobshel.htm (renamed from testshel.htm)
    |-- mymod.js
    |
    |-- HTML
          |
          |-- MYMOD
                |
                |-- mymod_a.htm
                |-- mymod_b.htm
                |--   ...
                |-- mymod_n.htm
                |
                |-- IMAGES
                      |
                      |-- mymod.jpg


WHISTLER INSTALLATION
-----------------------
For installation by Whistler setup OOBE development will need the following
information:
* name of the directory your module is enlisted in
* name of all HTML files
* name of all image files
* name of the script file

SCRIPT MODULES
---------------------
Scripts should be written in JScript.

The script module will be included in the appropriate shell modules
(msobshel.htm, dskshell.htm, ispshell.htm, regshell.htm) via a script tag.

  <SCRIPT LANGUAGE=jscript SRC="MyMod.js"></SCRIPT>.  

If you named your script file per the naming convention suggestions this will
be done automatically.

Scripting docs can be found at http://msdn.microsoft.com/scripting.

OOBE NAVIGATION
----------------
Navigation within your module is accomplished by creating a mapping between
each file and the one that is to follow it.  These mappings are stored in a
Scripting.Dictionary object.  The initialization should occur in the
MyMod_InitSimpleNavMap function.  

For each page except the last add a line
like the following:
  g_SimpleNavMap.Add("MyMod.htm", 
                      MyModDir+"MyMod_a.htm"
                     );
The function called in response to the ONLOAD event will call
InitButtons("DoMyModButtons").  This will set the ONCLICK handlers for the
Back and Next buttons to window.parent.SimpleNavBack and
window.parent.SimpleNavNext respectively.  SimpleNavNext looks up the current
page in g_SimpleNavMap, retrieves the path to the next page, and navigates to
it.  SimpleNavBack simply calls window.parent.history.back.  

The last page must call window.parent.GoNext();  This will cause
OOBE to navigate to the page that should follow the external module.


DEBUGGING
--------------
* Install the Script Debugger from Control Panel\Add/Remove Programs\Add/Remove
  Windows Components.
* ALWAYS set HKLM\Software\Microsoft\Windows\CurrentVersion\Setup\OOBE
    * OemDebug = 1 to turn on error popups and allow switching between OOBE and
      other tasks (such as ntsd and regedit)
    * MsDebug = 1 to allow tracing to the debugger from script.
* To send trace output to the debugger use the window.parent.trace(str)
  function in testshel.htm.  See the GoNavigate function in testshel.htm for
  examples.
* Occasionally an error popup will be activated but not displayed.  This will
  appear to you as if OOBE has hung.  Try pressing the Enter or Esc keys to
  dismiss the popup and continue.  If this happens continually, try putting a
  try...catch block around the suspect code and write the exception info to the
  debugger using trace( ).  For example,
    
    try
    {
        // suspect code
    }
    catch (err)
    {
        window.parent.trace("ERROR: " + err.number + ":" + err.description);
    }
* While OOBE is running you can press Shift+F10 to bring up a console window.
  This is especially helpful when something breaks in system context.
                    
RUNNING OOBE IN SYSTEM CONTEXT
---------------------------------
OOBE runs in the system context (prior to any user logon).  This can present
problems if subsystems that we rely on assume a user is logged in.  To run OOBE
in this context do the following:
* Set HKLM\System\Setup\
    * CmdLine = %windir%\system32\oobe\msoobe.exe /f
    * SetupType = 2 (no reboot)
    * MiniSetupInProgress = 1
* Reboot the system

The system will initialize, verify that the disks are okay, then run OOBE.


EXTERNAL DEV TASKS
--------------------------
Developers of external modules will need to perform the following tasks:
* Develop pages and scripts based on template files.
* Test pages and scripts using testshel.htm.  Ideally this should be done in
  system context (ie. prior to logon).  See the RUNNING OOBE IN SYSTEM CONTEXT
  section for more details.
* Supply OOBE development with the following information:
    * Module name
    * Name of first HTML file (for checkpoint)
    * Name of script file (so it can be included in shell scripts)
    * Where module fits in OOBE flow

EXTERNAL DEV INFO
-----------------------
* window.external methods
    These are methods provided by OOBE via the window.external object in the
    Browser object.
  * InfoObj.get_FirstName
    Retrieves the user's first name.

  * InfoObj.get_LastName
    Retrieves the user's last name.

  * ApiObj.get_SystemDirectory
    Retrieves the path to the system directory.

  * DebugObj.Trace
    Output trace statements to the debugger from script.

  * DebugObj.get_MsDebugMode
    Is MsDebugMode on?  If it is not, Trace does not work.

  * DebugObj.get_OemDebugMode
    Is OemDebugMode on?  If it is not, you won't see error popups or be able to
    switch from OOBE to other apps.

* Registry entries
  * Main OOBE reg key
    * HKLM\Software\Microsoft\Windows\CurrentVersion\Setup\OOBE
      * CKPT (Key)
        This is the checkpoint stack that tracks where the user has been.
        Whack this to restart OOBE.
      * Temp (Key)
        Temporary data store.  We keep information here until OOBE has been
        successfully completed.
      * OemDebug (REG_DWORD)
        Set this to 1 turns on error notification and allow focus to shift away
        from OOBE.
        shift focus away from OOBE.
      * MsDebug (REG_DWORD)
        Set this to 1 to turn on tracing to the debugger from script
        (DebugObj.Trace).
  * System setup key
    * HKLM\System\Setup
      This key controls the way the way that setup apps are run.
      * CmdLine (REG_SZ)
        Command line to be run by winlogon at startup.  For OOBE set this to
        %windir%\system32\oobe\msoobe.exe /f
      * SetupType (REG_DWORD)
        Set this to 0x00000002 to run the CmdLine.
      * MiniSetupInProgress (REG_DWORD)
        Set this to 0x00000001.  OOBE mimics the state of mini-setup.
* Template HTML and script files

OOBE DEV TASKS
-------------------
OOBE development will need to perform the following tasks to hook an external
module into OOBE:
* Add checkpoint for external module
* Add case for external module to GoNext, GoBack, GoCancel, GoNavigate as
  appropriate
* Add entry for checkpoint to status menus
* Call MyMod_InitSimpleNavMap( ) in InitCKPT() 
* Call g_MyModLastPage = MyModGetLastPage() from InitCKPT()
* Create a temporary msobshel.htm with above items for testing purposes.