assign data source

[themebuddies]

I made a test database And I made a form to enter the data. Two tables. a Purchase order table and a line item table. when I click into the line item field, it beeps at me and says the datasource for the field has not been set. I did notice that when hitting return, the PO field did enter the data into the database. Is there a tutorial somewhere that might show how to do this? or is this a code issue?

[orange]

Here is a link to some videos that may help you with tables and relationships.