aSupportedInContentTypes

A list of content-types that the server can send as input to translator. An array of null-terminated strings. 

aSupportedOutContentType

The content type the plug-in converts data to. 

aPreferredInContentType

The content type the plug-in would prefer to receive. It must be one of the supported content types passed in the first parameter. 

aReturnCode

On return, contains a constant that determines whether the server should continue with the default authentication procedure. 

One of the following constants: 

NS_CONTINUE_DEFAULT_PROCESSING

NS_OVERRIDE_DEFAULT_PROCESSING