Doubt in DatatTable select method

hi,
I just want ro return datatable values from XML file and need to do search functionality. So that i hope i have to use select() method of datatable to filter the input data.
My input data would be UserID, fromDate and Todate.. But need help to pass those three input parameter to filter the datattable through select method. 
Dim dr() As DataRow = dt.Select("UserID='" + txtUserID + "'")
Help me to complete the above method by passing fromDate and ToDate also
I hope this would be the right method the search the XML data.
-Thanks
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