If you do this in code

thisform.grid1.column1.dynamicforecolor = 'iif(myfield,rgb(255,0,0),rgb(0,0,0))'

>Thanks for your reply, Sergey.
>Set thisform.grid1.column1.dynamicforecolor to iif(myfield,rgb(255,0,0),rgb(0,0,0)) ?
>I tried that but got the invalid expression error ??
>
>>Set it to

iif(myfield,rgb(255,0,0),rgb(0,0,0))