i dont know .. but it have something to go with an excel object.
//to initialise
Dim objXL As Object
Set objXL = CreateObject("Excel.Application"
//here there is somecode i was using to create from
//acess a "relation" graph in excel
//its imcomplete of course, but can give an hint
objXL.Application.Visible = True
objXL.Application.Workbooks.Open txtMacroPath
DoCmd.OutputTo acOutputReport, "TableFieldList", acFormatXLS, txtCheminTablesExcel, True
objXL.Application.Run "MACROTABLE.XLS!CreateTable"
objXL.ActiveWorkbook.Save 'As "C:\temp\CreateTable.xls", 39
//the finaly "destroy" the excel object
Set objXL = Nothing
hope this help
jb