- DDE
 Not (yet) supported by XPCE. 
SWI-Prolog supports it though, making DDE a feasible interprocess 
communication approach.
- WinSock
 Provides standard TCP/IP communication, 
both server- and client-side.
- Named Pipes
 Not (yet) supported.
- OLE
 Not considered 
yet. We however are considering CORBA, which provides an open standard 
for object-oriented, network-transparent interprocess communications. 
CORBA and OLE are integrated.
- Drag-And-Drop
 XPCE can accept 
dropped files from other applications. Inside the application, 
drag-and-drop is fully compatible to the Unix version. Seelibrary(dragdrop).
- Cut/Paste
 Supported for exchanging text, and 
pictures using the Windows MetaFile format.
- DLL
 Not supported by XPCE. 
SWI-Prolog provides it though, making DLL available to XPCE/Prolog 
applications.