Need help to get picture from external application

Hi,

I have a barcode scanner and an application provided by scanner company. When we scan, the application will show a barcode picture in a form and some value in a text box. That application doesn't stores the picture anywhere in the hard disc. I do not have source code of that application.

I would like to get that picture shown in the form and store it in local hard drive.

Is there anyway to get that picture?

I know how to findwindow, findwindowex. I can take a screenshot of that window and save the picture. however, if other window overlaps that window then it takes the screenshot of the top most window. So, I am wondering whether any other option available to get the image from the form.1

Thanks