Fill textbox based on value in another

[bobfin]

I have a data entry form for Table-A. After I enter an account on the form, I use the account to get a value from a different table and put that value in another combobox. I tried using a SetValue to fill the combobox. I put the SELECT statement from a query in the Expression parameter. But Access doesn't accept that Expression and produces an error message about "Forms" not being a field. This has got to be a common action in forms, so there must be a better way to do this.

 

[RuralGuy]

Maybe this site will help: Cascading Lists for Access Forms

 

[ScottGem]

I have a data entry form for Table-A. After I enter an account on the form, I use the account to get a value from a different table and put that value in another combobox. I tried using a SetValue to fill the combobox. I put the SELECT statement from a query in the Expression parameter. But Access doesn't accept that Expression and produces an error message about "Forms" not being a field. This has got to be a common action in forms, so there must be a better way to do this.

Use a DLookup