Need code that does the same as hitting the F5 key

do you mean you have two combo boxes and you want to filter the second based on the selection from the first combo..

set the row source of the combo in the after update event of the the first combo

private sub combo1_afterupdate()

me.combo2.rowsource="select fieldName from tablex where [FY]= " & me.combo1

end sub

if [FY] is text data type use this

me.combo2.rowsource="select fieldName from tablex where [FY]= '" & me.combo1 &"'"

That didn't work.  
Here is what I had on the Row Source for the second Combo:
SELECT DISTINCT tbl_05_TypeInvoice.strTypeInv FROM tbl_05_TypeInvoice INNER JOIN tbl_01_Main ON tbl_05_TypeInvoice.strTypeInv=tbl_01_Main.strTypeInv WHERE (((tbl_01_Main.intFY)=Forms!frm_05_InvoiceGen!txtChooseFY)) ORDER BY tbl_05_TypeInvoice.strTypeInv;

I removed it and put on the first Combo in the afterupdate:
Private Sub txtChooseFY_AfterUpdate()
Me.txtTypeInv.RowSource = "select intFY from tbl_01_Main where [intFY]= " & Me.txtChooseFY
End Sub

Chose 2007 on the first Combo, the second one gave me a string of 2007.  What I should have gotten was the five different types of invoices that exist with a FY of 2007.

Did I do something different than you said?

Thanks, Pat

That worked, but is there any code that just does what the F5 does that I could use when needed?  

That worked perfect!  And a lot less code.  Still did it on the AfterUpdate of the previous ComboBox.  

Thanks, Pat

Thanks again!!