Do WIA scan without calling IWiaDevMgr->DeviceDlg()
I am trying to do a wia scan using the IWiaDevMgr, IWiaItem and IWiaDataTransfer Created the IWiaDevMgr as in the following code CComPtr<IWiaDevMgr> pWiaDevMgr hr = pWiaDevMgr.CoCreateInstance(CLSID_WiaDevMgr); then call the CreateDevice on that object with the correct device id hr=pWiaDevMgr->CreateDevice(str,&pItemRoot); and then i call DeviceDlg on the pItemRoot CComPtrArray<IWiaItem> ppIWiaItem; hr = pItemRoot->DeviceDlg( hWndParent, lFlags, lIntent, &ppIWiaItem.Count(), &ppIWiaItem ); make IWiaDataTransfer using the ppIWiaItem CComQIPtr<IWiaDataTransfer> pIWiaDataTransfer(ppIWiaItem[i]); and call idtGetBandedData to do the scanning hr = pIWiaDataTransfer->idtGetBandedData( &WiaDataTransferInfo, pDataCallback ); ; this code is working fine But now i want to avoid the pItemRoot->DeviceDlg call (I dont want to display the default UI) How can I do that? please help
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0 |
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cibz
2/10/2010 5:04:09 PM
development.device.drivers
941 articles. 
0 followers.
1 Replies
2626 Views
I found it we can use the IEnumWiaItem got by calling EnumChildItems
and enumarete the correct chiled item
see http://msdn.microsoft.com/en-us/library/ms629858(VS.85).aspx for
the implementation of the TransferWiaItem
(need to fix some bugs in the microsoft sample :) and implement the
CWiaDataCallback if you need implementation plz mail me)
CComPtr<IEnumWiaItem> pppIEnumWiaItem;
hr=pItemRoot->EnumChildItems(&pppIEnumWiaItem);
if (SUCCEEDED(hr))
{
ULONG fetched=0;
ULONG celt=0;
CComPtr<IWiaItem> pppIWiaItem;
pppIEnumWiaItem->GetCount(&celt);
if(celt>0)
{
pppIEnumWiaItem->Next(1,&pppIWiaItem,&fetched);
if(fetched>0)
{
hr=TransferWiaItem(pppIWiaItem);
if (SUCCEEDED(hr))
return hr;
}
}
}
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0 |
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cibz
2/17/2010 11:33:12 AM
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