We should now correctly track the relevant state per-context. The
IWineD3DDeviceImpl_SetViewport() call isn't quite correct for d3d8 and d3d9,
Stefan still has a patch for that.

The cbSize field for the REBARBANDINFOW structure was previously set to
the sizeof(REBARBANDINFOW), however, new fields were added to this
structure for newer version of windows.  Testing in Windows XP (or with
comctl32.dll from Windows XP) I found this larger size was rejected
causing the rebar to not be displayed in wordpad.

For some reason the code previously mixed up a selection cursor with the
result cursor.  The problem seemed to have corrected itself before as a
result of conversion between offsets and cursors, but my recent changes
made this bug more severe.