Umm I don’t know how you adding the richtextbox component, but is like this on the menu toolbar, click on Project there select Components now a windows of components will popup on the Control tab look for Microsoft Rich Textbox Control 6.0 check the box next to it and than hit Apply Now you should see the component on the components toolbox ๐ like this
But Bro, I start making a simple send text and getting lots of errors, So I need to figure it out.