Modules & VBA :: Passing Parameter To A Query - Data Sent To A Table

I have a function that when called transfers a query recordset to an excel spreadsheet then emails it. At the end of the function I use code to write the date sent to a table. Each time the function is called I only need records in the query that have been modified since the last time the function was called. I have a field in the query 'LastModified' with a criteria '>[Enter Date]'. I then look up the date in the table and enter it manually. I know how to look up the last date sent in table using code but getting the >#SomeDate# in the query with VBA.

Code:
DoCmd.TransferSpreadsheet acExport, , "qryUpdateWebmaster", _
"C:SubmarinersUpdates_Sent" & fname & ".xlsx", True, "Webmaster_Update"