Photoshop SDK beginner

I am a college student at the local university. I am interested in graphic design and computer science. Programming my own filter has sparked my interest. I am determined to learn at least the basics. I know java and am learning C++. I have recently downloaded the photoshop sdk and I am teaching myself about computer graphics. I am looking through some of the sample code for the filters and getting very confused. I cant find any how-to's to lead me in the right direction (other that the one on photoshoproadmap.com.) I would appreciate if someone could point me in the right direction. What knowledge base do I need to have to start writing my own plugins? Thanks
Photoshop SDK beginner
Read the PDF's.

Read the Dissolve sample code.



Try these articles



http://www.mactech.com/articles/mactech/Vol.15/15.04/PhotoshopPlug-InsPart1/inde x.html



http://www.mactech.com/articles/mactech/Vol.15/15.05/PhotoshopPlug-InsPart2/inde x.html
Photoshop SDK beginner
Thanks, the articles will point me in the right direction.