In Delphi3 you should do these steps 1) Copy the files MyComponent.hlp and MyComponent.cnt into the help directory of Delphi, for example (C:\program files\Borland\Delphi 3\help\). 2) Open Delphi3.cfg with a text editor 3) In the 3rd-party section at the end of this file, add the following line: :Link MyComponent.hlp 4) Delete the hidden file Delphi3.GID In Delphi4 and higher 1) Copy the files *.hlp and *.cnt into the help directory of Delphi (for example C:\program files\Borland\Delphi6\help\). 2) Start Delphi. 3) From the main menu choose Help | Customize... The OpenHelp tool starts and opens the configuration file of Delphi's online help. 4) Select the Index tab. 5) Choose Edit | Add Files..., then locate and open *.hlp files. This will merge the keywords in *.hlp file with the keyword index of Delphi's or C++ Builder's help. 6) Select the Link tab. 7) Choose Edit | Add Files..., then locate and open again your *.hlp files. This will enable context sensitive help for the component. 8) Choose File | Save Project, then close the window.