Hi
I set the parent to transparent then the color shown correctly.
Anyway, but there is still a white padding/margin around the tabcontrol, still could not figure where it came from.

Many thanks,

Hello JSW W.,

The area that you point in the attached image takes the BackColor of the NTabControl.Parent.

Best Regards,
Nevron Support Team

I added NTabControl inside NDocument /NdockMnaager

within NTabControl there is a space just behide the tabs... please see photo...
This never change color when skin change.

Also it has some margin/padding around the tab page as well.

is there a way i can fix it?
Thanks