RAD Studio VCL Reference
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TComObject.ObjQueryInterface Method
TComObject Class | TComObject Members | ComObj Namespace | Description
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Implements the QueryInterface method of the IUnknown interface.

Pascal
function ObjQueryInterface(const IID: TGUID; out Obj): HResult; virtual; stdcall;
C++
virtual __fastcall __stdcall HRESULT ObjQueryInterface(const TGUID IID,  Obj);
Description

QueryInterface queries whether the COM object supports a given interface specified by the IID parameter. QueryInterface is used as the implementation of the IUnknown QueryInterface method when the COM object (TComObject) is not part of an aggregate. 

 

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