I don't usually add columns to grids programmatically, so take this with a grain of salt. *s*

I believe there's a bug in VFP that can mess you up when you add a column to a grid that starts with 0 columns. You end up having an extra column called Column0. Instead, just leave the ColumnCount of your GC at -1.

In order to add any field mappings or your own control classes to the grid, you first have to set the grid's ColumnCount to something other than 0 or -1. But you can do this generically, if you want to map all the fields in the current table:

for li = 1 to fcount()
   listr = alltrim(str(li))
   grid.addobject('Column'+listr, columnclass)
   grid.column&listr..addobject('MyTextBox', textboxclass)
   grid.column&listr..currentcontrol = 'MyTextBox'
   grid.column&listr..controlsource = field(li)
endfor

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>I guess there's a little misunderstanding - thats my fault, so i'll try to make it as clear as possible.
>
>1. I subclass a grid. By default it does not have any columns, textboxes, etc. Just plain grid container.
>
>2. I add my grid class (GC) to the form. When I need my GC to show a different table, I'd set its RecordSource to that table and refresh the grid.
>
>3. After refresh, all the columns and controls inside the grid are created by default field mappings, without my intervention. The only thing I do programmatically is DeleteColumns (all of 'em) before changing RecordSource.
>
>4. How do I change field mappings for my grid class from default VFP textbox to subclassed textbox without adding any columns to the grid class (keeping ColumnCount = 0)? Is this possible?
>