Forms :: Linking A Text Box To A Combo Box?

I have a text box on a subform that I want to use to control a combo box on the main form - I know it's not how things should be done but I've no choice - these are my instructions. I'm using Access 2000.

The text box displays a short data in dd/mm/yyyy format and when data is entered into it, it populates a field in Table 1. The combo box displays all the months of the year which it obtains from another table which only has months in it. The combo box properties have Limit to List set to Yes. Once a Month is selected, it populates the month onto another Table, Table 2. The months have all been assigned with a numeric identifier (i.e. 1 for January and so on) but only the name of the month appears in the combo box.

What I have to do is have the combo box update the month it displays based on the short date in the text box. I've tried the After Update event on the text box to no avail. The code I tried there that didn't work was:

Quote:

Private Sub txtDate1_After Update
Me!txtDate1 = Me!cmbMonth
End Sub

I've tried similar code in the On Enter even for the combo box and this too failed. I've also tried switching off the Limit to List property of the combo box and this didn't work either.

I've also tried to set the combo box so that it links to the exact same fields as the text box and while this did work, all it did was have the date be displayed in the combo box in short date format and not as the name of the month.

I'm struggling to understand if this update is even possible. Can a combo box that has a Row Source limited to options in one table which it then updates onto a field in another table be controlled by just part of the date from a text box?