How to get linked file path, Link Info(C/C++)

Hello All,

I am trying to read Alt Text from "Object Export Options", I am able to read text when alt text sources is custom. I am not able to find out how to get this text when text sources is kXMPTitle/kXMPDescription/..

I think I need to get linked file path and read xmp meta data from that file. 

Can any one please help about how to get link info of a page item. how to get Linked file path?

{
    PMString altText("");

    do{
        InterfacePtr<IObjectExportOptions>exportobject(pageItemUIDRef, UseDefaultIID());
        ASSERT(exportobject);

        if(exportobject)
        {
            IObjectExportOptions::TextSourceType type = exportobject->GetAltTextSourceType();
            if(type == IObjectExportOptions::TextSourceType::kCustom)
            {
                exportobject->GetCustomAltText(altText);
            }else{
//How to get liked file path? How to get link info? how to get its metadata?
//                kXMPTitle
//                kXMPDescription
//                kXMPHeadline
//                kXMPOther
            }
        }
    }while(false);
}