python - How to see the 'example provider' in processing toolbox of QGIS?

I would like to create my own provider with the processing toolbox. I see the example provider in my folder C:\QgisWien\bin...\algs\ExampleProvider.

It seems to be a good start but unfortunately, I don't see the example provider in the processing toolbox.

I see this post : Is there a way to integrate my own custom tools into the Processing toolbox in QGIS?

I try to copy the folder ExampleProvider to my qgis plugins path but nothing.

I have Windows se7en and qgis wien installed.