I am currently doing a workshop where I am learning more about a certain tool, which is the primary tool I will be using. I am learning more about the tool, thus I am able to work better with it and create better and faster results.
This workshop was initiated and paid for by my boss so that I am able to get results more quickly rather than using hours of my boss's time to learn the tool and still not knowing everything I will learn in the workshop.
Can I use a completed workshop my boss initiated as leverage for a higher salary / more benefits?
Edit:
Some additional information, I tried to keep the question too general perhaps so it could be applied too more people.
Currently I am being 'underpaid' by 500 euro bruto for the average of my study and about 800 euro for this field. But I don't feel like I am being underpaid and appreciate the oppurtunity in the field. Ofcourse I would be happy if I could make more.
My current contract is a trial period to see if things are working out between me and the bussiness, as I am doing something new for this business.
Things have worked out as I am doing the course and my boss is happy with the results I am getting.