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RAD Studio VCL Reference
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TOleControl Class
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RAD Studio VCL Reference
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TOleControl is the base class from which ActiveX controls are derived.
TOleControl = class(TWinControl, IUnknown, IOleClientSite, IOleControlSite, IOleInPlaceSite, IOleInPlaceFrame, IDispatch, IPropertyNotifySink, ISimpleFrameSite, IServiceProvider);
class TOleControl : public TWinControl, public IUnknown, public IOleClientSite, public IOleControlSite, public IOleInPlaceSite, public IOleInPlaceFrame, public IDispatch, public IPropertyNotifySink, public ISimpleFrameSite, public IServiceProvider;
OleCtrls
TOleControl is derived from TWinControl and handles the interactions with COM necessary for using ActiveX controls. Most application do not need to explicitly derive a component from this class.
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Class Hierarchy