extern int ZEXPORT unzOpenCurrentFile2(unzFile file, int *method, int *level, int raw);
/* Same as unzOpenCurrentFile, but open for read raw the file (not uncompress)
- if raw==1 *method will receive method of compression, *level will receive level of compression
+ if raw == 1 *method will receive method of compression, *level will receive level of compression
NOTE: you can set level parameter as NULL (if you did not want known level,
but you CANNOT set method parameter as NULL */