RAD Studio VCL Reference
TActiveFormControl.ObjQueryInterface Method

The ObjQueryInterface method takes an interface ID (the IID parameter) and returns the requested COM interface on the object.

function ObjQueryInterface(const IID: TGUID; out Obj): HResult; override;
virtual __fastcall HRESULT ObjQueryInterface(const TGUID IID,  Obj);

The ObjQueryInterface method forwards the call first to the associated TActiveForm object if it supports the requested interface, otherwise it queries its own interface. 


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