- enhance some TRACEs

- Implement NdrGetBuffer, NdrFreeBuffer, NdrConformantStringBufferSize
  and NdrConformantStringMarshall.
- Define the RPC_FC_C_CSTRING constant.
- Perhaps I don't want those MIDL_*_FORMAT_STRING structs, after
  all. Removed.
- Add RPC todo list.
- MIDL_STUB_MESSAGE.uFlags aren't.
- Comment out the NdrClientCall2 mock-up since that stuff is in the
  process of being implemented and might cause problems.

Rearranged for simplicity.

success/failures.

- less confusion about stored settings

Update size info even if redrawing is disabled.
Trivial cleanups, and some tracing.

More debug tracing.

Do not store callback items for subitems, even if we're asked to.
Small cleanup.

Override custom draw bkgnd color for selection items.
Fill background for all items that have a bkgnd colour.

Reimplement SetRedraw to cope with the changes.

Add debugging helper for SCROLLINFO.
Fix potential bug in debugging helpers.

- silence errors

- add HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM default mapping
- remember old DirectX version strings

application.