Use this method to define Global variables, which are shared between multiple expression objects. aVar can be constructed externally and then passed to multiple TMtxExpression objects. The name of the variable can be equal or different between TMtxExpression objects, but the value will be modified concurrently and be the same in all. This value is stored in the aVar object. The type does not need to be defined upfront, but once defined an attempt for the script to change the type will be blocked. The type can be reset to undefined with a call to aVar.Undefine.

DefineVariable Method