Unfortunately, everything you change is redrawn to its original appearance when someone moves the start bar. I am facing a similar problem trying to remove advertisements from AOL Instant Messenger. I don't know how to keep the things from reappearing after a redraw.
Sending WM_CLOSE to the items causes errors later as AIM tries to get ahold of the window--it is unable to because I have closed them, and thus causes an error.
If anybody could help, that would be great. Thanks!