var oRoot = Application.ActiveProject.ActiveScene.Root;
var oCube = oRoot.AddGeometry("Cube","MeshSurface");
oTrans = oTrans = oCube.Kinematics.Local.Transform
//Change the scaling in x direction 
oTrans.SclX = 1.25 ;
oCube.Kinematics.Local.Transform = oTrans;