Reading the data from excel sheet in QTP

There is two methods are there to retrieve data from excel sheet.

1st method:
datatable.importsheet "path of the excel file.xls",source sheetID,desination sheetID
n = datatable.getsheet("desination sheetname").getrowcount
for i = 1 to n
columnname = datatable.getsheet("destination sheetname").getparameter(i).name
if colunmname = knowncolumnname then
value = datatable.getsheet(destinationsheetname).getparameter(i)
end if
next

2nd method:
set objexcel = createobject("excel.application")
Set objWorkbook = objExcel.WorkBooks.Open("path of the file.xls")
Set objDriverSheet = objWorkbook.Worksheets("name of the sheet")
columncount = objDriverSheet.usedrange.columns.count
rowcount = objDriverSheet.usedrange.rows.count
for i = 1 to colunmcount
columnname = objDriversheet.cells(i,1)
if columnname = knowncolumnname then
for j = 1 to rowcount
fieldvalue = objdriversheet.cells(j,i)
next
end if
next