>>when i'm resizing the headers in my grid the click event of the header is fired
>>and the column get ordered by it's index ..
>
>In your grid Header.Click(), add this code:
>
>

nWhere = 0
>this.Parent.Parent.GridHitTest(MCOL(MWINDOW(), 3), MROW(MWINDOW(), 3), @nWhere)
>IF NOT INLIST(nWhere, 2, 13)
>	WAIT WINDOW 'Click!'
>ENDIF

>
>Now you know if you're resizing or not.

Mike, it works great for resizing, but not for moving columns. Do you have an
idea, how to detect moving from Column.Header?

I tried David's suggestion and it works just fine. So, I updated my header class.