How to open a .csv file into excel using client_host (webutil configured in oracle forms)

 After Confirmation of your selected file existence in client machine, use below line code in oracle forms to force file to open:

Client_Host('cmd /c start excel.exe '||v_File_Name, No_Screen); 

--v_File_Name = Your selected filename with complete path e.g. "C:\temp\abc.csv"