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values, 119
variant compliant IDL data types, 144
Variant data type, 143,
VARIANT data type, 170, 457
VARIANT,
creating, 458-459
functions, 459-460
structure, 457-458
VB, see also Visual Basic
calling QueryInterface() from, 161-162
creating coclasses in, 161
test client (About box), 642-643
using callback from, 544-545
versioning, 77
versioning interfaces, 53-55
VIEWSTATUS enumeration, 663-664
virtual base class functions, declaring, 28
virtual function table, see vTable
virtual functions, 27
defining, 27-28
virtual keyword, 27
virtual pointer, see vPtr
Visual Basic, see also VB
and ad hoc polymorphism, 32-33
and COM language mapping, 159-162
data types, 143-144
using connectable object from, 560-561
vPtr, 31
vTable, 31
binding, 446
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