hi guys im looking for message boxes to pop up when certain cells are selected
to make this easier id like the followng

when cell a1 is selected a message box pops up and says hello ( for example )
when cell b1 is selected a message box pops up and says goodbye ( for example )
when cell c1 is selected a message box pops up and says your turn ( for example )
when cell d1 is selected a message box pops up and says game over ( for example )

your help as ever is much appreciated