How to Apply Functions to Microsoft Excel 2003

1. Click the 'Tools' menu in Excel.
2. Place the mouse-pointer over the 'Macro' icon, and click 'Visual Basic Editor.'
3. Click 'Insert,' and then click 'Module' from the drop-down menu.
4. Select a declaration from the drop-down arrow. Enter the function code in the window.
5. Click 'File' in the menu, and then click 'Close and Return to Microsoft Excel' option from the drop-down menu.