Part_ID is numeric as to match Part_ID autonumber key in Parts Table
Combo Box on Sub Form SF_Parts
Name : Part_IDcb
Control Source : Part_ID (from Link Table EstimatesandParts. Only contains Estimate_ID and Part_ID and autonum)
Row Source Type : Table/Query
Row Source : Q_Parts
Private Sub Part_IDcb_AfterUpdate()
txtPartName = DLookup("PartName", "Parts", "Part_ID = " & [Part_IDcb])
txtUnitPrice = DLookup("UnitPrice", "Parts", "Part_ID = " & [Part_IDcb])
End Sub
(also tried without square brackets)
Q_Parts is a Query
Part_ID
PartNumber
PartName
UnitPrice
PartDescription (sorted Assending)
This set up leaves the txt boxes both blank and no updates

when you change the Selection in the combo box
txtPartName : unbound
txtUnitPrice : unbound
Part_IDcb
all on SF_Parts