Last months I have been teaching a lot of NAV2009 upgrade workshops in The Netherlands, Belgium and the UK. One of the questions I am getting often is how to link a subpage to another subpage. In the UK workshop we started some experimenting. We found that when creating a subpage you get a field called provider ID in the properties.
This field is used in factboxes to link a factbox to the subpages, for example Item statistics to a salesline.
When you populate this field with the ID of the subpage you want to link it to you can populate the subformlink with the link to the correct table.
Read the rest of the post on my blog with images
http://dynamicsuser.net/blogs/mark_brum ... pages.aspx