DScrollPanel is a VGUI Element similar to DPanel however it has a vertical scrollbar docked to the right which can be used to put more content in a smaller area. DScrollPanels are essentially DPanels with the Scroll Bar.
If you would like to paint or edit the elements of the scrollbar use DScrollPanel:GetVBar. If you want to see if the scrollbar is visible then use the VBar.Enabled variable on the scrollbar's VBar.
Derives from DPanel.