object changes, responding to in user interface, 186–191
object communication using remoting, 45–47
object models, 49–54
object relationships, determining, 238–239
objects
book about, 53
creating one-to-one relationship with database tables, 50–51
deleting, 119–120
self-awareness of, 77
objectUri tag, 75
objSecurity object, 520
Observer/Observed pattern, 82
OK button, enabling/disabling, 391
On Error Goto structure, 123–124
On Error Resume Next structure, 123
one-to-many relationships, 51
one-to-one relationships, 50–51
Open File dialog box, 390
OpenFileDialog control, 385
OpenHack IV, 490
optimistic concurrency, 4
Option Explicit statement, 54
Option Strict statement, 54, 75, 410–411, 416
Overridable keyword, 110
(Overrides) entry, 120
(Overrides) option, 118
OwnerDraw style, 226
owner-drawn panels, 227–231