Dynamic picklists and other samples

Somebody asked me for some advice on how to create dynamic picklists. I have seen this question in the newsgroups several times as well. Now you might expect that I do have a coding sample for you, but I did not create one. And still I do have one which you can download here. Now... If I didn't create it, who did?Microsoft did create this for you. And made it available. And even better. You