URL schemes phone call choose app

I know you can start a phone in Xojo calling a url which with “tel: …”.

Is it possible to show the user a list with all available phone-app’s installed (like Skype, etc.) so he can choose with wathever app the phone call is make. I saw there is a thing called URL schemes, but I have no idea how to implement the api in Xojo.

According to this SO page, it isn’t possible:

Acoording to this entry:


there exists a possibility. But i don’t know how to adapt this for Xojo.