How to set style of TreeView.ScrollViewer 'VCScrollViewerStyle'

.Net Add-on Programming
1

I know that I can set ScrollViewer.Style ‘VCScrollViewerStyle’, but I can’t set TreeView.ScrollViewer.

TreeView.ScrollViewer
TreeView.ScrollViewer34×686 4.39 KB

to
VCScrollViewerStyle
VCScrollViewerStyle28×774 416 Bytes

for TreeView