general - Consuming a webservice through ssl

i am trying to consume a private web service that require me to prepare a CSR file,
after i gave them the file, they return a crt file, how should i use the file?
so that my website can communicate with the web service? where should i include the file?
normally most tutorial are for HTTPS website that is the cert used for client browser and for my case my share host server is a client to a web service.

Regards,

Depends on whatever you're using (eg, programming language or application) to access the service. You tell whatever it is where your certificate file is, and that the connection is secure, and the rest should be handled for you.