We were planning to use the external viewer and I decided to try testing the embedded and I cannot get it to load. So I went back to the sample app and it is throwing the same exception on the following line:
mHelpSystemClient.Load( mHelpSystemPath.Text )
Unable to cast object of type 'B3.HelpViewerKit.HelpViewerEmbeddedApplication' to type 'IEmbeddedHelpSystem'.
I have the v5 of the API installed and the help file was created with Flare 4.2.
Thanks for your help.