Just drag the component from the toolbox to  your windows form applications and...  you are ready to go!

Add capture functionality to your applications.

ImgScan Component is an invisible-at-runtime (windowless) control available for a .NET Windows Forms, which allows you to create sophisticated TWAIN compliant imaging applications. It can be easily integrated into applications written in .Net 2.0 languages such as Visual C++, Visual Basic or C#.
With ImgScan you can select the source, and access the scanned image by output directory or by the bitmap object.