hOW TO DETECT USER HAS TYPED IN PROJECT"S FORMS

Question

Hi,
I want to know if there is a property in Visual studio that let me know if the user has changed any field in the form for showing the save message when exiting.
I know that I can set a boolean in the onchange event of the field or the Grids but because there are a lot of field in different forms I am looking for a simple solution in order not change all the events.
Thanks