Since you mentionned you needed to import an Excel sheet into a table, I made the assumption that the user's computer had Excel installed in order to create the Excel sheet and the second reason I made that assumption would be this line of code you posted, which makes use of the Excel driver.

strconn = "Driver={Microsoft Excel Driver (*.xls)}; DBQ="+ALLTRIM(thisform.filein)+";ReadOnly=1"

>DOH, sorry i dont mention that I cant use excel.application because i dont know if the PC where this program is installed have excel or office...
>
>I try to use Alter table after this but all informations in the table are lost.