How to scan multiple pages in Flatbed scanner

[YogaV]

Please give me the suggestion on how to scan multiple pages in flatbed scanner like HP scanjet G4010 model. Here is my scenario… Once scanned a first document the app will ask the user confirmation like “do u want to scan next page?”. I have done this task… but If user click ‘yes’ the scanner will start to scan next page.

I have a function it will transfer the image from scanner to application. In order to do multi doc transfer I did a while loop on this function. But after the first document scanned, the returnCode has went to TWRC_FAILURE state instead of the state TWRC_XFERDONE. Because of this I am not able to scan the next document.

function getImage(){
m_returnCode = CallTwainProc(&m_AppId,&m_Source,DG_IMAGE,DAT_IMAGENATIVEXFER,MSG_GET,&hBitmap);
switch(m_returnCode)
{
case TWRC_XFERDONE:
g_vHandle.push_back(hBitmap);
m_bSucess = TRUE;
break;
case TWRC_CANCEL:
break;
case TWRC_FAILURE:
CancelTransfer();
m_bSucess = FALSE;
return FALSE;

}
}

Thanks,
Yoga V

[Catherine Sea]

Hi Yoga,

Did you check the error message to see why it went to failure?

Catherine Sea
http://www.dynamsoft.com

[Author]

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