tclcurl examples please

Hi,

I want to "http post" a file and some fields as "multipart/form-data",
and it looks so easy reading the curl docs.

Maybe I just exec it.

But a progress meter would be nice.

This should be a three lines job, but the docs don't explain anything.
Are there working examples? If possible without header fiddling, just
basic working examples.

Thanks.

Max
.