Syntax for reading .xlsx file

Hi experts, 

Below are the syntax for reading .CSV file. Kindly let me know any syntax for the reading .xlsx file 

import 'PMLFileBrowser'
Handle Any
Endhandle
using namespace 'Aveva.Pdms.Presentation'
!filePath = 'C:\Users\shadab.hussainc\Desktop\Project\Loads\Operating' + '.csv'
!file = object FILE(!filePath)
!records = !file.readfile()
handle any
return
endhandle
!recor = !records.SIZE()
!sgdzx = !recor

DO !X FROM 1 TO !sgdzx
!pinna = |$!records[$!X]|

!pina = |$!pinna|

Thanks in advance

Shadab Hussain Chiya