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 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.