By Amber Mertes

In Excel 2013, use of certain scriptable controls on a worksheet was deprecated. You will experience errors similar to those below when trying to insert one of the controls. The change was implemented to improve security and these errors are expected. This issue affects:

Web Browser Control
Microsoft Scriptlet Component
DHTML Editing Control
DHTML Editing Control (Safe for Scripting)

Errors you may experience:

Excel 2013:     "Cannot insert object"

Word 2013:    “This object cannot be inserted due to your policy settings. This error might occur if ActiveX controls or embedded objects in this file are blocked by policy settings. More information about this error message online.”

PowerPoint 2013:  “This ActiveX control cannot be inserted”

Workarounds:
1.  Use the control in a VBA UserForm
2.  Create or use a custom wrapper for the control

Additional Information
Cannot insert certain scriptable ActiveX controls into Office 2013 documents
http://support.microsoft.com/kb/2793374