For make the trojan horse you need Borland Delphi 7 you can donwload trial version and complete version ( but you need to pay ) , under you have Borland web site link.
For donwload in this page you need a account
To Join - CLICK HERE!
After you Join you can go to donwload page clicking here
YOU ONLY NEED BORLAND DELPHI 7 This is Borland Web Site