I am new to plugin development and am in the process of upgrading a plug-in developed under Acrobat 5. The SDK XI API documentation under "Plug-ins and Applications> Developing Plug-ins and Applications> Understanding Plug-ins> About plug-in initialization> Handshaking" references the DUCallbacks.h header file.
I have that header file in the Acrobat 5 SDK, but I do not see it in the current Acrobat XI download and I don't see any usage of it in the SDK XI samples. Am I missing files or is Ducallbacks.h no longer part of the SDK? If it's not a part of the SDK any longer, is there an updated version of the plug-in developer's guide that discusses handshaking under the current SDK? I have searched the Adobe site and not found anything newer than what's included in the SDK download.
Thanks!