Any application that would test other native applications would use this.
For example: Rational Functional Tester.

Rich Schwerdtfeger
CTO Accessibility Software Group


                                                                       
             Pete Brunet                                               
             <[email protected]                                         
             m>                                                         To
                                       Richard                         
             05/25/2010 09:37          Schwerdtfeger/Austin/i...@ibmus  
             AM                                                         cc
                                       Andres Gonzalez                 
                                       <[email protected]>, IAccessible2
             Please respond to         mailing list                    
             [email protected]         <[email protected]
                                       dation.org>,                    
                                       [email protected]
                                       uxfoundation.org, James Teh     
                                       <[email protected]>            
                                                                   Subject
                                       Re: [Accessibility-ia2] screen  
                                       reader present flag             
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       




Rich, What other apps are using this message?  How are they using it?
===
Richard Schwerdtfeger wrote:


      I have to agree with Andres. WM_GETOBJECT is not solely used by AT.


      Rich Schwerdtfeger
      CTO Accessibility Software Group

      Inactive hide details for Andres Gonzalez ---05/25/2010 08:48:08
      AM---WM_GETOBJECT is NOT a reliable way of detecting AT eitherAndres
      Gonzalez ---05/25/2010 08:48:08 AM---WM_GETOBJECT is NOT a reliable
      way of detecting AT either, since it may be triggered by apps and
      even device drivers that don't
                                                                       
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      WM_GETOBJECT is NOT a reliable way of detecting AT either, since it
      may be triggered by apps and even device drivers that don't have
      anything to do with AT, so you are guarantied false positives even
      with the best heuristics. I'm very interested in developing a
      reliable handshake mechanism with AT, and would love to hear from
      others with ideas/proposals on this respect. Perhaps we can take this
      task for the next edition of IA2 in this list, or by a subgroup of
      interested parties, and bring back a concrete proposal to the general
      group.

      Thanks,

      --Andres.





      From: [email protected] [
      mailto:[email protected]] On Behalf
      Of Pete Brunet
      Sent: Monday, May 24, 2010 4:18 PM
      To: James Teh
      Cc: IAccessible2 mailing list
      Subject: Re: [Accessibility-ia2] screen reader present flag

      Thanks Jamie, I'll have to check with the architects to see if they
      would have any issues with blocking. If I can block then I might also
      be able to lazily call into the secondary thread to build the tree as
      needed. -Pete
      ===
      James Teh wrote:
                  On 25/05/2010 8:37 AM, Pete Brunet wrote:

                              Thanks Jamie, [using WM_GETOBJECT to
                              dynamically enable accessibility] may be a
                              problem for the case where the app has
                              multiple threads and a secondary thread needs
                              to be called by the window
                              proc to participate in the building of the
                              accessibility tree.  Is it
                              acceptable to block the UI thread?

                  I don't see why this is any different to creating the
                  tree in the same
                  thread. Either way, it will block the UI thread, as the
                  WM_GETOBJECT
                  message needs to return the requested accessible object.
                  Can you shorten
                  the setup time by creating parts of the tree lazily only
                  when requested?

                  Jamie
                   _______________________________________________
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                  [email protected]
                  
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