I must be missing some but I cannot put SynEdit controls on a C++ Builder form (in a C++ Project), they are just not...

I must be missing some but I cannot put SynEdit controls on a C++ Builder form (in a C++ Project), they are just not available from the palette yet they are available for a Delphi Form (in a Delphi Project).

Are these components somehow built to be Delphi only?