Secure Eraser

I need a program (in Delphi if it's possible) that can ABSOLUTELY delete a file from the hard disk (not only mark as hidden). I need that the deleted file couldn't be recovered neither with software spy's like "Forensic utilities". And also it should be possible to delete a whole HDD (take a look at Ontrack DataEraser under [login to view URL] ). to do that it's required to build 2 version of this Program (Windows and Console--> bootable) Thank you ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform windows 98 and above