MATLAB: Problem on acessing excel by activeX command in Matlab

activexexcelMATLABobjectworksheets

I tested code below
Excel = actxserver('Excel.Application');
set(Excel,'Visible',1);
Workbooks = Excel.Workbooks.Open('C:\Users\Bibi\Documents\MATLAB\New Microsoft Excel Worksheet.xlsx');
Excel.Worksheets.Add
Then I found I successfully added a new sheet "sheet2" before "sheet1"
Actually, one can arrange the order of the sheet by adding count and before just as below,
Worksheets.Add *Count:=2, Before:=Sheets(1)
But how to add "Count" and "Before" in matlab language, I tried many times but all failed.