yes offcourse
presently i m using vfp6

for example the size of banking.vcx is 2400KB, and now i m modifying class loan and just saving it without making any changes , now the size of classlib
banking.vcx will be 2560KB (there is no virus in my system)
now it i creat a temp.vcx and drage all class from banking.vcx to temp.vcx
then banking.vcx will return it's original size