I need to change sorting of records when user clicks on a column header of a grid. As far as I know how to do it, you have to replace "Header1" from the column object and replace it with your own custom object. The problem I am having is that it works when grid has no columns and you build it from "scratch."

But I am trying to make it work on an existing grid (that is, grid build in the designer). So when I run the following code in the INIT method of the form:

for each loColumn in thisform.grid.columns
	loColumn.RemoveObject( "Header1" )
	loColumn.AddObject( "Header1", "custom_header" ) 
endfor

I get error on the line .AddObject. I am using VFP 6.

Does VFP 8 grid have functionality that would allow me to make this work on an existing grid (that is, without having to build grid in the INIT method)?

Thank you