Sample Download :
CS Version: http://code.msdn.microsoft.com/CSASPNETVerificationImage-36b20812
VB Version: http://code.msdn.microsoft.com/VBASPNETVerificationImage-222c132f
This sample will demo you how to create image Verification Code in ASP.NET.
You can find more code samples that demonstrate the most typical programming scenarios by using Microsoft All-In-One Code Framework Sample Browser or Sample Browser Visual Studio extension. They give you the flexibility to search samples, download samples on demand, manage the downloaded samples in a centralized place, and automatically be notified about sample updates. If it is the first time that you hear about Microsoft All-In-One Code Framework, please watch the introduction video on Microsoft Showcase, or read the introduction on our homepage http://1code.codeplex.com/.
Just create a drag and drop captcha control to be nicer and eye candy :)
Don't know why no one is doing this yet...all using this dumb captcha stuff than is hacked as easy as anything else..