now i see...lol :p ,thanks for the explainations . "Boris Zbarsky" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Eric wrote: >> as for your suggestion ,i don't fully understand ,cause my goal is to >> implement an independant application based on xpcom ,with xulrunner >> and i want my xpcom --the MyComponent.dll also be able to response to the >> notifications both from dll and from javascript . >> if i don't inherit from nsIObserver > > Your _component_ should inherit from nsIObserver. Your _interface_ should > not. C++ supports multiple inheritance; use it here. ;) > > -Boris
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