subform not passing value to table

[Paintballlovr]

I'm brand new to subforms, so maybe this is an easy fix. I have a subform that is pulling one of it's values from the main form, which seems to work fine (=[Forms]![Manual Input Form 10 CHECKS]![LB_BatchNum]). It is displaying this number for each entry in the subform, but when I look at the table the subform is writing to, this information is missing. Am I not using the proper method for capturing this number or is there a setting in the properties I need to adjust to capture this number along with the rest of the entry(ies) on the subform?

[Paintballlovr]

I think I found the answer, with the master and child link. I removed the above code to capture the number and used the link instead and it appears to be working. If someone has some input if there is a different/better way to do this, I'd be curious to know. I'll close this issue in a day or so if there isn't any movement. Thanks.

[Bob Fitz]

Presumably the number is show in a text box. The text box should have its Control Source property set to the name of a field in the table that the subform is bound to.