Hi Zeus and many thanks to your kindness for help.
I myself made custom visual styles and I'm completely stucked with something I thought you could be the one to find out how to.
Here is a screen of the part I'd like to locate but I've search many weeks in vain.
The pink part as treeview ( navigation pane or systreeview ) of explorer . I don't have any idea how to get rid of that to put some picture of my own.
This is an old pb posted too on style builder forums and doesn't seem to be in shell32.dll file . This argb background sure exists but where ?
Btw , I already had some help to know how to mod the commandbar like I asked you so it's now ok . Thanks anyway.
Here is a screen of what I'm looking for . imgur.com/Pjprw6Q