I need a VERY simple application made using Visual Studio 2010 VB.net
It will allow the scanning directly to PDF files.
I think it can utilize libHaru 2.1.0 (MSVC8) for free as the DLL for generating the PDFs ([url removed, login to view])
You open the program, you can browse for the folder and enter the file name of the pdf you wanted created, click scan now and it will open the TWAIN/WIA connected device's driver and scan and save the PDF. It will provide a confirmation that is has been completed.
IF there are multiple TWAIN/WIA devices connected, it will have need to popup a list to select which one to use.