Multipart/form - HttpClient 4

Hello,

I want to upload a file, or more specific a file and some parameters, in a multipart/form.
I've not been able to find anything in the API docs or examples that show me how (for HTTPClient-4).
I've read many places about MultipartRequestEntity - but thats not part of HTTPCore/Client-4 as far as I can tell.

Is it possible to post multipart data using HTTPClient-4 ?

Thanks in advance!
Magnus