suppress dataset table events?

Is it poosible to suppress dataset table events? I have a columnchanging event attached to my dataset table. this table gets filled/initialized with data from another function. I would like to allow the user to then edit table cells by clicking on them keyboarding through. After an edit the column change event would fire and make some calculations on the edited data and update some other cells. my problem is that the initial table filler function triggers the same column changing event but i dont want the same calculations to happen on the data from initial table filling. How do i differentiate the events? how would know if a column is being changed via a function call or user input? User input would be click on a cell, edit data , hit enter (one columnchange event) which takes you to another cell , edit data , hit tab (another columnchange event) ? I would rather keep the logic inside the columnchangeing event then have to implement every keyboard and mouse event. thanks .