68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
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#ifndef __DEVLIST_H_INCLUDED
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#define __DEVLIST_H_INCLUDED
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#include <windows.h>
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#include <sti.h>
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#include "proparry.h"
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#include "pshelper.h"
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typedef CComPtr<IWiaPropertyStorage> CDeviceListType;
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class CDeviceList : public CSimpleDynamicArray<CDeviceListType>
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{
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public:
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CDeviceList( IWiaDevMgr *pIWiaDevMgr=NULL, LONG nDeviceTypes=StiDeviceTypeDefault, LONG nFlags=0 )
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{
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Initialize( pIWiaDevMgr, nDeviceTypes, nFlags );
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}
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CDeviceList( const CDeviceList &other )
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{
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Append(other);
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}
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const CDeviceList &operator=( const CDeviceList &other )
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{
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Destroy();
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Append(other);
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return *this;
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}
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virtual ~CDeviceList(void)
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{
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}
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bool Initialize( IWiaDevMgr *pIWiaDevMgr, LONG nDeviceTypes, LONG nFlags=0 )
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{
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Destroy();
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if (!pIWiaDevMgr)
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return false;
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CComPtr<IEnumWIA_DEV_INFO> pIEnumWIA_DEV_INFO;
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HRESULT hr = pIWiaDevMgr->EnumDeviceInfo( nFlags, &pIEnumWIA_DEV_INFO );
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if (SUCCEEDED(hr))
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{
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ULONG ulFetched;
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CComPtr<IWiaPropertyStorage> pIWiaPropertyStorage;
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while ((hr = pIEnumWIA_DEV_INFO->Next(1,&pIWiaPropertyStorage,&ulFetched)) == S_OK)
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{
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LONG nDeviceType;
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if (!PropStorageHelpers::GetProperty( pIWiaPropertyStorage, WIA_DIP_DEV_TYPE, nDeviceType ))
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{
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// An error occurred
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return false;
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}
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if (nDeviceTypes == StiDeviceTypeDefault || (nDeviceTypes == GET_STIDEVICE_TYPE(nDeviceType)))
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{
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Append(pIWiaPropertyStorage);
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}
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pIWiaPropertyStorage.Release();
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}
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}
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else
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{
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return false;
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}
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return true;
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}
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};
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#endif
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