It is possible to use accented characters within your library system. To access the Windows character map, Press the Windows key+R on your keyboard to open the 'Run' command box, type 'charmap' in the box and press 'Enter'. The 'Character Map' utility will start.
Click on the desired character followed by 'Select' and the character will appear in the 'Characters to copy' box, click 'Copy' to copy the character to your clipboard.
In your library system, click where you would like the character to be placed then right click and select paste or press Ctrl+V on your keyboard to paste the character.