Enter Appointement from button in Forms

Hello,
I have a form and would like to enter appointement clicking on a button.
My calendar must is using google API
I tried the link button but it open the calendar not the form to enter appointement.
I tried a forms from the table rendezvous but id_event_google are then not generated.
Does someone has a “trick” to call directly the forms of the calendar ?

In case someone ask for it…
It’s not possible