Hi!
I am currently working with SolidWorks API and need that specific blue highlight background colour (differs for light and dark themes) in the CAD/CAM Tree when an item in the Tree is selected. I tried using one of the enum values for GetUserPreferenceIntegerValue, i.e. swSystemColorsTreeItemSelected, but that didn't work for me. 

The swSystemColorsTreeViewBackground as well as the swSystemColorsTreeItemNormal