val = oOpcData.ItemEx(index).Value
oOpcData.ItemEx(index).Value = val
|index||(Variant) Identification of the variable either by its name (String data type, case sensitive text, for example "a1") or by the index (zero-based index).|
|nAttr||[optional] (Long) Enables to change the behavior of the method.|
0 (default) - default behavior (as Item property).
1 - when referencing the non-existent variable the global error in the INFO system won't be generated.
The Var object includes information about the variable (value, name, index, etc.).
The Item property (like Var object) is read only, which means that the object cannot be changed but for example it is possible to write into the Value of the Var object.
If the variable does'nt exist, Nothing value is returned. Nothing value can be tested by VBScript Is operator.
' ... error