How to upload file with form-post using c++ Qt-WebKit?

Question

So, when i was dealing with forms before what i would do is find web element that is part of the form input, set value of that form input by element.setattribute("value", "infoi want to add")

then simply when i set value of form elements i click submit button of form.

Is this possible to do with web-form input type="file" and how can i do it?

Thanks