It's not really our intention to implement every feature of a programming language in Visual Build itself. We provide the features that would most often be used in build scenarios, and if you need to go beyond that, you can use script code and repeating build rules.
http://www.kinook.com/VisBuildPro/Manual/script.htm
http://www.kinook.com/VisBuildPro/Manual/buildrules.htm