We at times are required to convert excel files into csv to read as flat files and sometime require to convert a csv file into excel file to use excel features on the data.
 
Below function shows how to convert an csv file into excel file and vice versa. We can also convert to other formats based on constants
Here constant value 23 is used to create a csv file and constant -4143 to save a file as xls file.Once the destination file is created, we can delete the source file as shown below. In case of any issue in understanding the code, please add in comment section
 
 Call func_ConversionCSVExcel("E:\Test.csv", "E:\Test_converted.xls", "csvtoexcel")  
 Public Function func_ConversionCSVExcel(strSrcFile, strDestFile, Conversion)  
 on error resume next  
 Set objExcel = CreateObject("Excel.application")  
 set objExcelBook = objExcel.Workbooks.Open(strSrcFile)  
 objExcel.application.visible=false  
 objExcel.application.displayalerts=false  
 If(Conversion = "ExceltoCSV") Then  
   objExcelBook.SaveAs strDestFile, 23  
 else  
   objExcel.ActiveWorkbook.SaveAs strDestFile,-4143  
 End If  
 objExcel.Application.Quit  
 objExcel.Quit    
 Set objExcel = Nothing  
 set objExcelBook = Nothing  
 Set objFSO = CreateObject("scripting.FileSystemObject")  
 objFSO.DeleteFile(strSrcFile)  
 Set objFSO =nothing  
 End Function