Add Help Functionality to Spreadsheet

[slimimi]

Hi - is it possible to add a macro to my worksheet that, if pressed, the cursor will change to a ? sign (like a help sign or symbol) and then have a string of ranges which fire different msgboxes to show the user what they have to do, eg, string of ranges :

If user selects Cell A23 then msgbox
If user selects Cell B5 then msgbox
Is user selects Cell C11 then msgbox

etc, etc.........

What would be the best way to come out of this mode?
Should i create another macro which switches back to normal mode?

Any suggestions?