Rick,

>I tried this briefly but didn't see any changes. Where does this need to be called? Just anytime from within the app?

I think it just has to be called once, before the particular control that you've set flags for is instantiated. I had that call in form.Load. I suspect it is in effect for any instance of the control instantiated within the app lifetime. Looking at the article on MSDN it says the call is additive over time. Wwhich means I'm not sure how you'd turn one off once it's on, I guess you'd not really want to do that anyway.

>I didn't see any change with the tree or listviews, status or progress bars.

Those flags are all independent and you set each one right? In my testing Wed night treeview displayed themed scrollbars. I didn't fiddle with listview. Last night I tried progressbar because the guy on the newsgroup said it didn't work for him. Since I don't use themes all the time, how does a themed progressbar look different than the Win95 appearance? Last night it just was a blue segmented bar for both cases, but that's the color of my windows titlebar in both cases too.