IKBService kbserv = UIServices.KB;
if (kbserv != null && kbserv.CurrentModel != null) // If the kb is open and current model is selectioned
{
string kbDirectory = kbserv.CurrentKB.Location; // Take path KB Folder(Root)
}
// Another Examples
string vrLocation = UIServices.KB.CurrentKB.Location; // KB(Root)
string vrTargetPath = UIServices.KB.CurrentKB.WorkingModel.TargetPath; // Web folder
string vrEnderecoCompleto = vrLocation + "\\" + vrTargetPath + "\\web\\"