I followed this tutorial and successfully created a custom service application in my sharepoint server, my question is how to consume it from another sharepoint solution, for example I created a new empty sharepoint project and added a new application page, how I can get access to strongly type service application object from the code behind of application page?
Thanks for your help
You need to create Service Application Proxy by using
SPServiceApplicationProxy. You can see the video and sample code in Creating Custom SharePoint 2010 Service Applications and Consumers.