---
UID: NF:control.IBasicVideo.IsUsingDefaultSource
title: IBasicVideo::IsUsingDefaultSource (control.h)
description: The IsUsingDefaultSource method queries whether the renderer is using the default source rectangle.
old-location: dshow\ibasicvideo_isusingdefaultsource.htm
tech.root: DirectShow
ms.assetid: 85cb633f-95cd-4cbe-9572-324ec784e6bb
ms.date: 12/05/2018
ms.keywords: IBasicVideo interface [DirectShow],IsUsingDefaultSource method, IBasicVideo.IsUsingDefaultSource, IBasicVideo::IsUsingDefaultSource, IBasicVideoIsUsingDefaultSource, IsUsingDefaultSource, IsUsingDefaultSource method [DirectShow], IsUsingDefaultSource method [DirectShow],IBasicVideo interface, control/IBasicVideo::IsUsingDefaultSource, dshow.ibasicvideo_isusingdefaultsource
f1_keywords:
- control/IBasicVideo.IsUsingDefaultSource
dev_langs:
- c++
req.header: control.h
req.include-header: Dshow.h
req.target-type: Windows
req.target-min-winverclnt: Windows 2000 Professional [desktop apps only]
req.target-min-winversvr: Windows 2000 Server [desktop apps only]
req.kmdf-ver: 
req.umdf-ver: 
req.ddi-compliance: 
req.unicode-ansi: 
req.idl: 
req.max-support: 
req.namespace: 
req.assembly: 
req.type-library: 
req.lib: Strmiids.lib
req.dll: 
req.irql: 
topic_type:
- APIRef
- kbSyntax
api_type:
- COM
api_location:
- Strmiids.lib
- Strmiids.dll
api_name:
- IBasicVideo.IsUsingDefaultSource
targetos: Windows
req.typenames: 
req.redist: 
ms.custom: 19H1
---

# IBasicVideo::IsUsingDefaultSource


## -description



The <code>IsUsingDefaultSource</code> method queries whether the renderer is using the default source rectangle.




## -parameters






## -returns



Returns S_OK if the renderer is using the default source rectangle, or S_FALSE otherwise.




## -see-also




<a href="https://docs.microsoft.com/windows/desktop/DirectShow/error-and-success-codes">Error and Success Codes</a>



<a href="https://docs.microsoft.com/windows/desktop/api/control/nn-control-ibasicvideo">IBasicVideo Interface</a>



<a href="https://docs.microsoft.com/windows/desktop/api/control/nf-control-ibasicvideo-setdefaultsourceposition">IBasicVideo::SetDefaultSourcePosition</a>
 

 

