Sage 300 integration

Our company need to integrate sage to our Hotel management software in order to allow exportation of Bills, invoices, payments, suppliers etc to sage 300. I have been looking for in depth resources on how to achieve this, but could not find any samples. I tried accessing sources from http://dppwiki.sage300erp.com/wiki/Main_Page, but I can neither login nor register. Does anyone have leads to where I can find great resources on how to achieve this using VB.NET or C#.