with thisform.grid1.column2  &&here grid.column2 for ex.
*.dynamicforecolor=255  &&dont work
*.dynamicforecolor="255"  &&dont work
*.dynamicforecolor=rgb(255,0,0)  && dont work
.dynamicforecolor="rgb(255,0,0)"  && work 
*must be mandatory a valid expresion between quotes to be evaluated by vfp.Specifies a character expression evaluates at run time to a single color value.
* The color value is reevaluated at run time whenever the Grid control is refreshed
.refresh  &&mandatory because a grid column cannot refresh automatically.
endwith