* harbour/contrib/hbwin/hbwinole.h
* changed HB_OLE_C_API define to be compatible to other similar
defines, i.e. defined() vs. !defined() instead of 1 vs. 0
* harbour/contrib/hbwin/axcore.c
! fixed missing IDispatchVtbl definition in C++ mode
* harbour/contrib/hbwin/hbwinole.h
* harbour/contrib/hbwin/axcore.c
* harbour/contrib/hbwin/olecore.c
* a few C/C++ compatibility macros introduced. Cleaned code: two
version of method call code is not required any more