Yesterday , when I use Delphi 7 in Windows 7 , I find a problem still happening as in Windows Vista . You need addtional Winhlp32.exe installed in your system . As I just announced in the post : ‘Direct download link of Winhlp32.exe for Vista‘ . You may need this to read Files with .hlp !
Unfortunately , It needs Geniune advantage validation from Microsoft , which is not convenient for offlines users . So I upload them (includes x32 and x64 visions) .
To download a copy for Vista , visit here