>I want to make class file that can't be modified by other..
>is there anyway???
>
>or anyother file that are in the project..

You can compile the project into an app or EXE and make that available to other people; once compiled, it can't be modified or broken up into its component parts without using a tool like REFOX to extract the source code. You can also in the case of a class library remove the visible source code from the Method memo field (the class library is an adaptation of the .DBF file format); this will make the class usable but will make it unmodifiable without going back to the original or extracting source as above.

If you want to make the components of a project visible but in a read-only form, you can flag the files as Read-Only, blocking people from modifying them, but the Read-Only flag can be removed at the operating system level. A number of options exist to control access to the attributes of a file; under NT (or Win95 in a network with user-level sharing permissions enabled, controlled by an NT domain or Novell file server user list) you can make files (NT only) or directories (Win95/98/NT) available with different permissions on a per-user basis; only users with at least Change permissions for the file or directory can alter the read-only attribute of that file or directory, making this about as secure a mechanism as you'll encounter without compilation.

hth,

Ed