Creating COM/COM+ component server in PowerBuilder classic 12 and above

We are in process of migrating our Power Builder classic code from PB11.5 to 
PB12.6 ,

We have a PB Classic application which builds into COM/COM+ DLL's , being
exposed to and called by third party applications.

I see the functionality of creation of COM/COM+ DLL's is removed in PB12+ ,
This is hampering us from migrating from PB11.5 to PB12.6

Can anyone please suggest an alternative to this.