>Here's the function I use.
>

>* FUNCTION IsField
>LPARAMETERS String
>* Pass in a string that may be a memory variable,
>* a Field_Name, an Alias.Field_Name, or an object reference.
>* Returns true if the string corresponds to a field.
>* This function allows one to know if a Value must
>* be REPLACEd into a ControlSource, or STOREd to it.
>
>* Depends on SET COMPATIBLE to be set to OFF or FOXPLUS (the default)!
>
>RETURN (OCCURS('.', m.String) = 1 AND USED(JUSTSTEM(m.String)) ;
>	AND FSIZE(JUSTEXT(m.String),JUSTSTEM(m.String)) > 0) ;
>	OR (OCCURS('.', m.String) = 0 AND FSIZE(m.String) > 0)
>
>

>
>>Is there a way to determine if a controlsource was a table field or a property - variable?
>>
>>I need to know this to assign a new value to the controlsource of an object programmatically. I have added the "controlsource" property to a container and i need a way to reassing a value to this controlsource.
>>
>>Fields use the REPLACE command and properties/variables use the "=" assignation.
>>
>>Any clue?

Thanks, i have already found this solution.
But yours was a 1 line program, really straitforward!

:-)