You can insert an ActiveX control into a dialog box from the toolbar or using the Insert ActiveX Control dialog box.

To insert an ActiveX control from the Toolbox

Right-click an empty section of the Toolbox.
On the shortcut menu, click Customize Toolbox, and then select the controls that you want.
Drag controls to your dialog box in the Dialog editor.

To insert an ActiveX control from the Dialog editor

On the shortcut menu, click Insert ActiveX Control.

Note
When you insert an ActiveX control from Insert ActiveX Control into a project, wrapper classes are not included in the project. You are responsible for creating a wrapper class to customize the control's functionality.