Private Sub CustomerIDcombo_Change()
CustomerID=DLookup(CustomerID, "CustomerT","CustomerID=" & CustomerID)
CompanyName=DLookup(CompanyName, "CustomerT","CustomerID=" & CustomerID)
"FirstName"=DLookup(FirstName, "CustomerT","CustomerID=" & CustomerID)

ect. ect

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Reply from Richard Rost:

OK... it looks like your combo box is named [CustomerIDcombo] and you're trying to read the value [CustomerID] in your code. These have to be the SAME THING.

CompanyName=DLookup(CompanyName, "CustomerT","CustomerID=" & CustomerIDcombo)