Excel 2007 : DialogSheet in Excel 2007

where is "DialogSheet" Data Type in Excel 2007
i had a VBA Code in an Excel File that Work in Excel 2003 properly
but opening this file in Excel 2007 occured error on this line of Code
Set DlgFormSheet = ThisWorkbook.DialogSheets("Form")

that
Dim DlgFormSheet As DialogSheet

I used this Excel File to save other Excel file as DBF file for foxpro
can you help me to use this Converter in Excel 2007

file is Attached "save_dbf.xls"
Contact me at hashemi-te@esfahansteel.com
or
hashemi.teimoor@gmail.com

best regard
hashemi