I have a database that tracks amounts spent for Interpretation services. There is a main table (tblInterp). Each row is an episode of interpretation. This table contains fields for case number, date of service, language and amount charged. There is also a table (tblLanguage) with two fields: language and Rate (the rate charged per hour of interpretation). The user enters data from a form that has a combo box for language, which uses tblLanguage as its row source.
What I want to do is allow the user to enter/modify the rate charged at the same time as data on individual episodes of interpretation are entered. For example, if the user needed to enter one hour of Mandarin (into tblInterp), but there was no rate in tblLanguage for Mandarin, the user should be able to enter the rate into tblLanguage in the same operation as entering that episode of interpretation into tblInterp. The rate would be entered into say, a text box and would be stored in tblLanguage and be available the next time an episode of interpretation for Mandarin was entered. the rate, itself isn't stored in tblInterp; the rate is multiplied by the number of hours from another text box, and that amount is stored in tblInterp.
I tried a text box whose content was governed by the language combo box. Wherever there was a rate for a language in tbllanguage, it showed in the text box, but I couldn’t make tblLanguage the control source and store the rate there. How else can I do this?