How secure is an embedded SWF file?

I know there is a security sandbox for SWF files when working with projectors or browser plugins with local or network access.

But how secure is a SWF file when you build a wrapper (in Delphi) and load it with the Delphi Flash ActiveX control?

In my case the SWF only has to pass some text data from and to the Delphi application. There is no further need for local or network access

Is there a way to protect the SWF from an attack? Or is there no need to do that?

Sorry, I'm a newby to this stuff.

Thanks.