Cetin,
Thanks for the help. I figured it out finally. What I was trying to do is like below:

*&  In the MSHFlexGrid Click event.
WITH THIS
     ...
     .SORT = IIF(.SORT=1, 2, 1)
ENDWITH

The problem is that the property Sort is a Write-Only property. The error occurred when I tried to access it. So I created a form level property to hold the Sort Order value and goes from there to solve the problem. Thanks a lot for your help.


Wan