How To Install Custom Component in Delphi (into existing package).

1. • Start Delphi and select Component | Install Component...
   • This will invoke the "Install Component" dialog.
   • In the "Unit File Name" edit box enter the name of the unit you want to install.
   • If the unit is in the Search Path, a full path name is not required. If the unit directory is not in the Search Path, it will be added to the end.
   • The "Search Path" edit box displays the path used by Delphi to search for files. Leave this as it is.
   • Use the "Package file name" drop-down list to select the name of an installed package.
   • Click on OK.
   • Delphi will prompt you whether you want to rebuild the modified package or not.
   • Click on Yes.
   • After the package is compiled, Delphi will show you a message saying that the new TSomeComponent component was registered and already available as part of the VCL.
   • Close the package detail window, allowing Delphi to save the changes to it.
   • The component is now available in the components palette.
   • Drop the component on a form, and simply: use it.
     

Tips:

1. • In step 3, you can click on the Browse button to browse for the component (unit)
   • In step 6, default package is "Borland User Components", there is no special need to alter this.