Amembers() accesses combo control in a column too. Are you sure combo is there ?
I just tested using foxyclasses' UdfObjCollector and it showed all grid elements including the combo.
Haven't checked your code thoroughly but as I can see what you're doing wouldn't it be shorter to do :

thisform.SetAll('BackColor', gnActivate)

Cetin

>This code is called from the init of a base form....
>
>I included the code below. We have several uses for this in our base class the most import being that users get a visual que that they looking at historical data when the entire program changes color. The problem i am having stems from a combobox I have added to the grid which will not change color. On steping through the code I see the grid has column1-column4 as its members but each of the columns has only Header1 and TXT1 as their members even column4 which has the combobox added to it. So the code never gets to change the combobox color....Is this expected behavior or bug? Why would the combobox not show up as a member in AMEMBERS
>
>
>Thanks in advance,
>
>mike
>
>******************************************************************************** Code: base.vcx:frm.setcolors()
>*** Author: Michael S. Mitchell
>*** Date: 19 July 2001
>*****************************************************************************LPARAMETERS toReference
>LOCAL loObject, loCurrentObject, ;
> lcCurrentObject, lcBaseClass, ;
> lnNumberofMembers, I
>LOCAL ARRAY laMembers[1]
>DIMENSION laMembers[1]
>
>loObject = toReference
>lnNumberofMembers = AMEMBERS(laMembers,loObject,2)
>I = 0
>
>IF loObject.BaseClass $ 'Form#Container'
>loObject.BackColor = gnActivate
>ENDIF
>
>FOR I = 1 TO lnNumberofMembers
>*** Build the current object as a string
>lcCurrentObject = "loObject." + ALLTRIM(laMembers[I])
>*** macro expand the string to get an object reference
>loCurrentObject = &lcCurrentObject
>*** get the baseclass of current object
>lcBaseClass = loCurrentObject.BaseClass
>
>DO CASE
>
>CASE lcBaseClass $ 'Label'
>
>IF loCurrentObject.Backstyle > 0
>loCurrentObject.BackColor = gnActivate
>ENDIF
>
>CASE lcBaseClass $ 'Textbox#Combobox#Editbox#Listbox'
>loCurrentObject.DisabledBackColor = gnDeactivate
>
>CASE lcBaseClass $ 'Shape#Checkbox#Commandgroup#Optiongroup'
>loCurrentObject.Backstyle = 0
>CASE lcBaseClass == 'Page'
>
>IF RIGHT(ALLTRIM(lcCurrentObject),5) == 'PAGE1'
>loCurrentObject.BackColor = gnActivate
>This.setcolors(loCurrentObject)
>ELSE
>loCurrentObject.BackColor = gnDeactivate
>This.setcolors(loCurrentObject)
>ENDIF
>
>CASE lcBaseClass $ 'Form#Container' OR lcBaseClass = 'Pageframe'
>
>CASE lcBaseClass $ 'Form#Container#Pageframe#Grid#Column'
> This.setcolors(loCurrentObject)
>
>CASE lcBaseClass $ 'Header'
>*** Dont do anything to it
>
>ENDCASE
>
>ENDFOR