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Because different versions of an ActiveX control might have different properties, support is included in the ActiveX control classes for handling different versions of persistent data. In this lesson, the Circle control is modified to reject persistent data that is of a different version than the control itself. Selective loading and/or storing of persistent data for different versions of controls are also discussed.
Note You can find a finished example of this lesson's code in the CIRC3 sample source code directory.
In this lesson, you will: