Creating scripted right click menu items

Back when I was only using my Amiga, there was a scripting language called Arexx and I could do stuff like this. Does anyone know an easy way to do the same on Windows?

For example I want to create a menu item that I can choose when I right click on a picture file that auto fixes and resizes a photo and uploads it to photobucket and copy the link to clipboard.

Registry stuff. I don't know much, but I would assume a key is created in the registry that links to x types of files for right clicking, then the value for the key links to a program or script to do when used, sending the right clicked file to the program.

Not sure how to do this for the context menu, but you could make a python/.exe where you drag the file on to it, and it does the same thing, you can also make batch files that do something similar.