This is an elementary question, and I am exhausted from looking all over for the solution so I thought I would tap into the unlimited resource here...
I have two tables tblProject and tblInvoice.
In the tblInvoice one of the fields asks for JobNumber. I would like to, based on that JobNumber, to look up tblProject for the corresponding ContractValue and auto fill a field in tblInvoice with that ContractValue.