(unknown)

Dear Sirs/Madams! 
    I am working on JavaXPCOM now, but I have some trouble with Extension Manager. I can't get nsIExtensionManager interface in following code: 

    nsIExtensionManager em = (nsIExtensionManager)serviceManager.getServiceByContractID("@mozilla.org/extensions/manager;1", nsIExtensionManager.NS_IEXTENSIONMANAGER_IID); 

I got such error: 

"getServiceByContractID" returned an error condition  (0x80570016) 

When I try to look into the problem, I discovered that I couldn't get many service interfaces, such as nsIXULAppInfo of "@mozilla.org/xre/app-info;1" component. 

I would be appreciated if you could give me some advice, such as:point out my fault and the reason.

Best wishes.




Sincerely,
francejason
2008-07-30

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