In-Proc/Out-of-Proc

The Communication Driver can run only as a stand-alone process (out-of-proc). If the option CLXCTX_ALL is chosen, out-of-proc activation for the Communication Driver is triggered. Explicitly starting as part of the client process (in-proc) is not currently Communication Driver supported. Activation using the CLSCTX_ACTIVATE_64_BIT_SERVER flag is also not supported.

When the Communication Driver is running out-of-proc, it supports requests from both DDE/SuiteLink and OPC client applications.