Markus was telling us:
Markus nous racontait que :

Control Toolbar controls are ActiveX controls that can accept code and
events (Click, Double Click, Get Focus, Change, etc.) built into them. For
this reason, the latest version of Office will automatically deactivate them
if the security is set to High, as it will probably be in large offices
where IT people are on the look out...
Also, they can be somewhat unstable and unreliable in Word documents. They
are much more stable in  Excel.

Formfield controls do not have the problems I outlined above. But, to be
useful, the document must be protected for forms and there are not events
associated with them, except for the possibility of having a macro execute
when entering or exiting the formfield.

Personally, I think the disadvantages of the ActiveX Controls are too
serious too ignore. The only time I have ever use them was in a very
controlled environment in a very simple document.

I always use a Userform, Formfields or MACROBUTTON fields.