in reply to Deleting Files on Win32

I want to secure delete shred these files

You might check out Shred, Wiper, Cleaning up your hard disk, and Bitwise File Shredding.
There's some good stuff in those threads, in addition to the codes presented in the root nodes.

But I'm also offering my own solution: overwrite a file.

A word spoken in Mind will reach its own level, in the objective world, by its own weight