Firstly, you can put it in Grid.Init event:
This.Mycolumn.DynamicCurrentControl="''+IIF(mycursor.fieldX=289,'Text1','Text2')"
Here, mycursor is your grid recordsource. You may also use Form's custom property here, and reset it e.g. in Grid.AfterRowColumnChange event.

>O.K., I've been playing around with this idea this morning but can't get anywhere. Somehow, I'm not using the DynamicCurrentControl propery correctly. For example, I've tried testing by putting this code in the AfterRowColChange event:
>
>THISFORM.Grid1.Column1.DynamicCurrentControl = IIF(RECNO('cTable')=2,"Text1","Text2")
>
>Ed, can you please give me some code sample on how to use this property properly? Thanks.
>
>>You may add two controls (textboxes) to each column, one is permanently enabled and another- disabled. Then you will use Column.DynamicCurrentControl to 'enable/disable' cells (property expression will be based on some record field value).