The problem is you're using a literal string as the controlsource for the column. If you want to edit the column, you need to use a field for the controlsource.

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>Hi everybody,
>
>I have this fragment of code in Grid.Init:
>

> with this.columns(i)
>     if type(lafieldlist[i])="L"
>          if lcCaption"ADCDesc"
>               .controlsource=[IIF(]+lafieldlist[i]+[, 'N', 'Y')]
>          else
>               .controlsource=[IIF(]+lafieldlist[i]+[, 'Y', 'N')]
>          endif
>     else
>          .controlsource = lafieldlist[i] && Assign controlsource
>     endif

>
>It works fine while grid is ReadOnly. Now I want to make these logical fields edittable in Form.EditMode. My question is: how can I make them edittable and preserve original formatting, e.g. true (.t.) equals 'N' and false (.f.) equals "Y"?
>
>Thanks in advance for your suggestions.