data from exel to visio for timeline
 

I would like to have a visio figure in my excel spreadsheet that shows a
timeline and obtains 4 values of time from 4 cells in my spreadsheet.
Start_date, End_date, event1_date, event2_date. Noramlly, I would try macro
recorder to find the appropriate object names and then edit the code. This
has worked when I deal solely with excel. For Visio, I can't seem to find an
appropriate way to create the linkage to cells in visio. Can someone help
me out?