Call "root_dir" -> "parent_dir" if it suits you better...
In your case "root/parent_dir" would be "C:\Program Files (x86)" and ImageMagick would search for files in "C:\Program Files (x86)\etc" and "C:\Program Files (x86)\lib".
Call "root_dir" -> "parent_dir" if it suits you better...
In your case "root/parent_dir" would be "C:\Program Files (x86)" and ImageMagick would search for files in "C:\Program Files (x86)\etc" and "C:\Program Files (x86)\lib".