Google's contact management functions are based on the Google Contacts API. The Contacts API has been deprecated by Google. Therefore, ggl* functions may fail with the response: 

HTTP request failed.

HTTP return code: <HTTPBadRequest>

Server message: <Contacts API is being deprecated.

Migrate to People API to retain programmatic access to Google Contacts. >

Error Code: 600005

Level: Non-fatal error

Module: wd270ggl64.dll 

In order to regain access to contacts, the call to the ggl* functions must be replaced by an equivalent call to the new People API using the RESTSend WLanguage function. People API syntaxes are detailed on the Google website:

https://developers.google.com/people/api/rest

An example of code for GglListContact is provided in french here:

https://blogs.pcsoft.fr/fr/remplacement-fonctions-gestion-contacts-google-ggllistecontact-suite-changement-api-google/281474976711023/read.awp

The concerned functions are: 

* GglDelete: Deletes a contact or a group of contacts.

* GglListContact: Retrieves the list of contacts associated with the specified Google account.

* GglListContactByRequest: Retrieves a list of contacts from custom parameters.

* GglListContactGroup: Retrieves the list of groups of contacts associated with the specified Google account.

* GglRequest: Sends a communication request (HTTP request) to a Google service.

* GglWrite: Creates or updates a contact or a group of contacts.