[WP] word press filter, plugin building?

[Jragon]

So, I need to make a little form, that has the names of all the articles. With check boxes next to the name. When submitted it sends through the checked title names. Then it it gets the articles from using the titles. After that it runs the articles through my filter, and updates the articles. How on earth would I do this :S I've got good knowladge of PHP, but not so much of WordPress

 

I don't have a clue how I could create a plugin like that.