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