Adding my own resource file: error "Duplicate Resource"

Problem/Question/Abstract:

When I try to add a resource to my project's .res file, I get a "Duplicate Resource" error when linking. The resource I have added is a unique resource.

Answer:

The projects resource file is generated by the IDE wizard, and is not intended to be modified. To add additional resources to your project, create a separate resource file with a unique name that does not conflict with either the project or any of the unit names, e.g. "MyRes.Res". Then to add the resource file to Delphi, simply add the following line to any unit file in the project:

{$R MyRes.Res}