Force use of a date picker control
 

On a worksheet, column A is the "Beginning Date", column B is a date picker
control for Column A, column C is the "Ending Date", column D is a date
picker control for Column C.

This worksheet will be used by many users and as a result, there will be
many different date formats. I would like to control this by forcing the
users to use the date picker controls to select the beginning and ending
dates.

Is there a way to display a pop up message if a user starts keying a date in
either Column A or C? If the user uses the date picker control, no message
would be displayed.

Thanks for the help.....
--
JT