Ok thanks. The example of the sprites is not what I am looking for. I am looking for a simple example with:
1) a large background bitmap
2) with small sprite-bitmaps moving around.
Just flat stupid bitmaps running around.

And handling the input is more a general question:
The mouse/keyboard messages are usually catched by some window with a handle, but this window or displayscreen does not know what to do with the mouseclicks: in my opinion the game-engine is the entity that "knows" everything. I am having lots of that kind of OOP problems and always working on my own. Sometimes you go blind then