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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