Simon,

>I bound a textbox to a datasource and then selected the BindingSourceMember however when I compile the project I get an error saying that "BindingSource" is not defined. I assume I have forgotten to add a namespace reference but do not know which one. I believe I have all the references described in the jump start.

BindingSource is an MM .NET property...is this a Windows or Web application?

If you double-click on the error produced by the compiler it should take you to the line of code that is causing the error. Can you post that line of code here so I can see what's going on?

Regards,