Check whether a user is registered on skype or not

Question

I am using Skype API to make a video call.Till now video call is working fine.I used an Xml file to save Skype credentials(which are used to call any other Skype friend/user). B

Answer 1

Presumably, at some point you're using the credentials to connect to Skype.

Simply don't save the credentials until you successfully connect.

(I hope by "credentials" you don't mean "plaintext username and password".)