Use this function to search a element of a list. If the element is found the index of this element is returned else -1 is returned. The function demands the following parameters:
%List.Find(ListName,ElementValue,Mode)
Thereby the parameter ListName is the name of a previous defined list and ElementValue ist the search value.

The parameter Mode is optional, and can be one of the following values:
CaseSensitive -> search with check for case sensitivity
Example:
%List.Find(MyList,123)