In VB.NET, what are the steps for creating and editing a user control that will be added to the Tool Box tool bar? I am creating a tool bar for the richtextbox control. I started out just adding the controls for font and bold capability (no code). When I built the project, .net automatically added it to the tool box. I added the control to a form and everything checked out. I reopened the user control and added some code, built the project again. But this time when I opened the form where I had placed the control I got the error Object reference not set to an instance of an object. I assume I am not following the proper steps, since no errors showed during the build. Thanks for the help.