>>Here's one example - ugly results, but...
>>

>>** custom form method GetBackColor()
>>Local lcDOW, lnretval
>>lcDOW = cdow(mytable.datefield)
>>do case
>> case inlist(lcDOW,"Monday", "Wednesday", "Friday")
>>  lnretval = rgb(0,0,255)
>> case inlist(lcDOW,"Tuesday", "Thursday")
>>  lnretval = rgb(0,255,0)
>> otherwise
>>  lnretval = rgb(255,0,0)
>>endcase
>>return lnretval
>>
>>** grid.Init()
>>this.setall("DynamicBackColor", "thisform.GetBackColor()", "Column")

>
>Wanted to suggest the same, Larry suggested, but hesitated for some reason :)
>
>Two additional questions:
>1) Can we return character from the function, e.g. str(lnRetVal) and call thisform.GetBackColor without quotes?

You can but it only evaluates the first record and sets the DynamicBackColor based on that.
e.g., in my example, my test data had the first day = Thursday, so they all got set green.

>2) Would it be slower than nested iif?

I tested with 50K records and showed no difference - both fired in no time. (Literally - 0.000 seconds)

>
>Thanks in advance.