Gradient-Color-2
This property allows you to set or retrieve the end color of the gradient effect of the Tree-View control.
If this property is not set, but 
Gradient-Color-1 is set, then the start color of the gradient effect is black.
Note - the gradient effect is not supported along with the 
Table-View style.
  
Example - Define a tree-view control whose background color goes from gray to white
screen section. ...   03 screen-1-gr-1 Tree-View      line 5.7      column 3.1      size 34.6 cells       lines 15.5 cells       gradient-color-1 rgb x#c0c0c0      gradient-color-2 rgb x#ffffff      gradient-orientation gradient-northeast-to-southwest      id 16      . ...  |