If you mean automating Visio .... open the VisualBasic Editor in Viso and Press F1
...or do you mean programming that uses Visio ...like LonMaker, VisualLogic, WorkPlaceTech etc?
1 + 1 = 3 ( *** for very large values of 1)
...everybody wants a box of chocolates and long stemmed rose
Be brave. You cannot get eaten by an imaginary tiger.