InfoPath Dev

Thanks Qazi, I had previously found this link, but I still do not understand how to return a dynamic parameters. On each of my pages the reference number is different. I do not want to set the parameter I want it to change based on the page.

I have created a page layout in sharepoint that is used to create "Positions Vacant" pages. They contain a number of fields one of which is "Reference Number". I have added an "Apply" link to the page layout which opens an "Application" infopath form. All works very well. But there is a field on the form ...