Toolbars, Headers and Rebar > Toolbars & Headers > Header > HeaderSortArrow
Toolbars, Headers and Rebar > Toolbars & Headers > Items View Header > HeaderSortArrow
Sorry these are only the arrows.
But I found it. If you want to replace the default white space (look at "Größe" or "Typ") than here's the place:
Toolbars, Headers and Rebar > Toolbars & Headers > Items View Header > <default>.
There is a clear overlay picture by default in it. If you delete all the properties within
Default you get the same look like in "
Add Remove Programs" or just change the image to your needs.
See here (it looks dirty but you can see what changed). The default white space (background) has now a shadow.
And here you can see the result when you delete all the properties within "
Default":
Than it looks like in "
Add Remove Programs"