Does anyone know the title of a French comedy with 'Henri' in the title?

Question

The plot is that two old school friendss meet, one is Henri with his girlfriend (Plum) and the other is on his way with his family to their cottage in the country. Henri appears friendly and helpful, but soon his admiration for the poetry his friend wrote at school gets out of hand, and he takes drastic measures against those who dislike it. It is a dark comedy.

Answer 1

It's "Harry, He's Here To Help" (or "Harry un ami qui vous veut du bien".)

I'm pretty sure it's that because I remember the scene with the poetry really well.