BCGControlBar Pro for MFC
void CBCGPGridCtrl::SetDisabledTextColor ( BOOL  bSet = TRUE,
BOOL  bRedraw = TRUE 

Specifies whether disabled grid has a special (grayed) text color.

bSetIf this parameter is TRUE, grid item texts will be drawn with a gray color when the grid is disabled.
bRedrawIf TRUE, the grid control will be redrawn.