You will need to install the infragistics software. The MM Infragistics controls inherit from the infragistics stuff.

It is just when you add the controls to your toolbox, you will need to manually add the MM Infragistics controls that you want to use.

The infragistics controls are added automatically to your tool box. You should never use those. Use the controls that Kevin has subclassed.

I have not actually used the Infragistcs controls yet (but I have them in my toolbax). Someone can correct me if I am wrong though.