__published:
     __property TDx_Event OnDestroy = {read=FOnDestroy, write=FOnDestroy, nodefault};

• Description
• See Also

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The OnDestroy() event is triggered by the TDx_DrawGammaControl::Destroy() method, just before the TDx_DrawGammaControl internal LPDIRECTDRAWGAMMACONTROL interface is destroyed.

Note: This event is an ideal place to place code that reverses the results of the TDx_DrawGammaControl::OnCreate() event. For example, assume you have already setup the TDx_DrawGammaControl::OnCreate() event to retrieve the component's capabilities, Create() a dependant component and allocate some memory;
You can then fully automate and insulate your code on a per-component basis by placing code in the TDx_DrawGammaControl::OnDestroy() event to deallocate memory, Destroy() the dependant components and, when required, destroy the capabilities component.

TDx_DrawGammaControl