since...

commit ba81e5c6
Date:   Thu May 28 21:35:43 2015 +0100

    tdf#91702 - fix stack-based MessBox allocation.

There is no special ScopedVclPtr<X>::Create or
ScopedVclPtrInstance<X>::Create just
VclPtr<X>::Create and a raw VclPtr<X>::Create()->foo
doesn't call dispose on the owned X

Change-Id: Ifacc8d5e742820701307c3c37b9b86487667d84f