Optional
aInstancePtr: objectA run time mechanism for interface discovery.
NS_OK if the interface is supported by the associated instance, NS_NOINTERFACE if it is not.
aInstancePtr must not be null.
[in] A requested interface IID
[out] A pointer to an interface pointer to receive the result.
Generated using TypeDoc
To get a component that implements nsIDocumentLoaderFactory for a given mimetype, use nsICategoryManager to find an entry with the mimetype as its name in the category "Gecko-Content-Viewers". The value of the entry is the contractid of the component. The component is a service, so use GetService, not CreateInstance to get it.