No, sorry but we have not yet implemented this type of functionality in the Visual Studio Immediate Window.
The current support is very limited in scope as there is no way to actually perform an assignment of a data item to a value using commands.
If you specify a command like:
>Debug.EvaluateStatement x="123"
It will return with the following
FALSE
That is because the "=" is currently viewed as an equivalence operator and not an assignment operator in COBOL.
The easiest way to change the value of a data item while debugging is to simply hover the mouse over the item and then change its value.
Thanks.