The STK Util library is a COM library containing objects and enumerations shared by the STK Objects and STK X type libraries. The types provided by STK Util are used indirectly through methods and properties in the those libraries. It also supports various standalone utilities, such as date, coordinate and unit conversions.
The STK Util library is built on Microsoft Component Object Model (COM) technology and can be used in environments supporting standard COM automation. Available environments include .NET (Visual Basic, C#, etc.), Java, C++, PowerPoint, Excel, Access, and scripting languages supporting COM late binding.
STK Programming Interface 11.0.1