ZLIST is a handle to Zeolite variables with a variable type of VarID_varlist.
This data handle is widely used in the 'zlist_' API functions, and may be wrapped by the CzList class.
You may safely cast between ZLIST and ZVAR. Casting does not change the variable type referenced by the handle.
In Zeolite_defines.h:
typedef ZVAR ZLIST;