Specifies the path to the inprocess-server DLL.
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
\InprocServer = <full path>
The InprocServer entry is relatively rare for insertable classes.
If a container is searching the registry for an InprocServer, the 16-bit version has priority with a 16-bit container, and 32-bit version has priority with a 32-bit container.