COM4ABAP x NET4ABAP

hi,

I work with sap version 620. I have to execute functions from *.dll in background and foreground.

Second one i do using transaction SOLE(OLE2).

Now i don't know how i can using *.dll's functions at the application server(when i execute in background).

I read that the SAP DCOM Connector will be set end-of-life (com4abap) and SAPGUI 4.7 and higher go to (Net4Abap). I can using com4abap or net4abap?

thanks,

Alex