It looks main.c is not gcc friendly.

[albertopatino]

Looking at system call there is a PAUSE command invoke so I was afraid this was not going to compile with gcc.
Fixing is ease: gcc supports attribute((noinline)) void IncrementDirect() instead of declspec

Issue with vtable trick was not that easy to fix:

(gdb) p *((void **) obj)
$26 = (void *) 0x403070 <vtable for IncrementerVirtual+16>

Using your syntax:

(gdb) p ((((void ***) obj))+0)
$161 = (void *) 0x401c60 IncrementerVirtual::~IncrementerVirtual()
(gdb) p ((((void ***) obj))+1)
$162 = (void *) 0x401c88 IncrementerVirtual::~IncrementerVirtual()
(gdb) p ((((void ***) obj))+2)
$163 = (void *) 0x401cb4 IncrementerVirtual::Increment()

In your code offset +1 points to destructor, so I had to use offset +2 in your code.

With my syntax using array index:
VoidMemberFn* updateFn = (VoidMemberFn*)(&(GetVTable(dynamic_cast<IncrementerBase*> (objs[0])))[2]);

Very nice program by the way