How do I launch the onscreen keyboard from my application on Mac OSX?
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You can run KeyboardViewerServer.app in whatever way your language does it (you don't say that)
From terminal:
open -a KeyboardViewerServer
I found it at /System/Library/Components/KeyboardViewer.component/Contents/SharedSupport/KeyboardViewerServer.app
If you have problems with Leopard see also
http://discussions.apple.com/thread.jspa?threadID=1257002&tstart=50
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