Using text box data from form in query.

[lvengineer]

Hello Programmers,
I have been working on this last problem for my database for some time. There have been many helpful posts but I am missing a concept I believe.
My database main form has txtStartDate and txtEndDate text boxes. It also has a command button to run a query and preview a report. My query calls the text boxes dates input in the Date critera but instead of using the user entered dates on the form, it produces "pop boxes" asking start and end dates.
SQL for query is:
SELECT [Exception Data Entry Table].Employee, Sum([Exception Data Entry Table].Credit) AS SumOfCredit
FROM [Exception Data Entry Table]
WHERE ((([Exception Data Entry Table].Date) Between [Forms]![frmGroup Report Form]![txtStartDate] And [Forms]![frmGroup Report Form]![txtEndDate]))
GROUP BY [Exception Data Entry Table].Employee;
How do I use the dates entered on the form i.e. "attach" them to the query and search the table records between those dates instead of getting the pop up forms asking for the dates.
Thanks for any help,

lvengineer