Sorry for my poor English,

< lol >!!!! You're English is much better than my Greek! When I was in Crete a couple of years ago, all I learned to say was Ευχαριστίες and Παρακαλώ.

1) For the generated error: Is this normal and if you know what is this mean?

I have never seen it, so I do not think that it is normal. I am sorry, but I do not know what it means.

IMPLEMENTS _Application2 IN "InfoPath.Button"
....
is this correct? I am expecting something like Word’s.

I am sorry - I cannot help you there. I am unfamiliar with the InfoPath object model.