The Insert (ActiveX or Design-Time) Control dialog displays a list of all available controls. You can add any of these controls to your topics.
Select a control to insert: Displays an alphabetically sorted list of controls. The control that you select appears in the text box above the list.
Note: If you are adding custom ActiveX controls to your project, the corresponding .OCX files need to be distributed and registered on all end-user systems in order for them to work properly.