webdynpro ABAP independent application

hello,

I have developed independent application of webdynpro ABAP

i want to integrate it on portal

i have page, create iview, assign application url to the iview - all this i do in portal content administration etc

but in later versions, instead of iview etc, there is bankend transaction code, ie tcode in R/3 where I can assign my web dynpro application to portal

I need the name of that transaction code. kindly help with your inputs

thanks

bhakti