Hook to intercept client contact management in admin area?

[Remitur]

Hello.

Does exist any hook useful to intercept client contact editing page in admin area  ( /admin/clientscontacts.php?userid=1234&contactid=5678 ) ?

What I need is to inject HTML code in as (as possible, i.e., with AdminAreaClientSummaryPage

I guess that AdminAreaPage could be used, but  AdminAreaPage "accepts a return of key/value pairs to be made available to the template layer as additional template variables"; so to use it should also edit the related admin area .tpl file... but I can't understand where this .tpl file is hidden...

[AladdinJ]

<?php

add_hook('AdminAreaClientSummaryPage', 1, function($vars) {
    return 'This message will be output on the Client Summary page. I can add HTML here';
});

I think this hook what you need

[Remitur]

10 hours ago, AladdinJ said:

I think this hook what you need

Nope, because AdminAreaClientSummaryPage works only on /admin/clientssummary.php , while I need to interact with /admin/clientscontacts.php ...