This property allows you to set or retrieve the start color of the gradient effect of the Tree-View control.

If this property is not set, but Gradient-Color-2 is set, then the start color of the gradient effect is black.

The gradient effect overrides the color set by Background-Color.

See "Color management" for further details.

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