Does Christening Make You a Christian?

Catholics actually believe that any Baptism/Christening, regardless of denomination, which uses the words "in the name of the Father, and of the Son and of the Holy Spirit" and involves the use of water, either through pouring or immersion, validly initiates a person as a Christian.

Are you a Christian if you have been christened?

If you want your child christened/baptised then you as an adult make that choice for your child. The important thing about them both is that once you are baptised/christened then you are a part of the Christian church.

What is the difference between a Christian and a baptism?

Baptism is a ceremony performed when someone, even a non-Christian, is initiated into the Christian faith. Marked by the ritual of using water to signify the washing away of one's sins before becoming Christian, the process admits the recipient into the Christian community.