Search online for a "Visual Basic" program to convert ISBN-10 codes to ISBN-13 codes in MS Access. (One such program is listed in the Resources.)
Highlight the "Visual Basic" code with the mouse and copy it.
Open the database in MS Access. Click on "Database Tools." Find the icon for "Visual Basic" and click it.
Delete the sample code in the "Visual Basic Code Editor" window. Paste the "Visual Basic" code into the window.
Click on the icon of the key to return to Microsoft Access. You should now have buttons available for converting ISBN-10 to ISBN-13 and a text box for inputting and displaying data.
For each entry you need to change, copy the entry into the text box. Click on the button to convert the ISBN-10 to ISBN-13 format. The new ISBN will appear in the text box. Copy the new ISBN and paste it in the appropriate field.