eg :
I have 12 column from col1 to col12 of which col1 is made is made Header = FIXED.
Now when the scroll is done from Left to Right then col2, col3 and so on gets behinds the col1 due to Fixed header behavior.
So is it that those column become hidden ?.
How do i track the col2 & col3 position & visibility while scroll is going on.
No, the columns are not hidden. If you want to determine which columns are visible, you can use grid.ActiveColScrollRegion.VisibleHeaders.