There is a problem with the DSOM IDL that is shipped in VisualAge C++ (SOM
Toolkit component) and it can't be used to generate valid/usable HH headers.

SOM support says this problem will be fixed in their CSD level 2.1.2
which is to ship soon.

In the meantime we have put together a simple DTS DSOM sample that
includes hand-massaged HH headers for the DSOM components,  which is in
DSOMSAMP.ZIP.  The .ZIP file also contains a sample that uses XH headers.

If you have any questions, please contact vacpp@vnet.ibm.com.