how to update click co-ordinates during runtime

Hi,



I am actually dragging the Well Name to the X attribute box and TvdTotal to Y axes box and every time when i want to click on Tvdtotal and drag to the Xattribute, the co -ordinates change and instead of dragging Tvdtotal, it will drag Waterdepth. I will need to change the co-ordinates accordingly. Is there any other way to do this? As you have said, going by the co-ordinates is not a good idea.



Thanks for helping.