DSum values problem

On a report I am trying to use VBA code to sum hours on a text field in the onprint event of the report.  

Here is what I'm attempting to write:

Me.txtGrp1RegHrs = DSum("RegHrs", "tblTimeCardTranxDetail", "tblTimeCardTranxHeader.TranxDate" is between Forms!frmSelectDatesForHRreport.txtStart and Forms!frmSelectDatesForHRreport.txtEnd

Note that the criteria uses a separate table.field.  Also, I know this syntax is wrong.

Can this be done?
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Jeffrey CoachmanMIS LiasonCommented:

Me.txtGrp1RegHrs = DSum("RegHrs", "tblTimeCardTranxDetail", "tblTimeCardTranxHeader.TranxDate BETWEEN" & Forms!frmSelectDatesForHRreport.txtStart & " AND " &  Forms!frmSelectDatesForHRreport.txtEnd)

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