An application sends a ZGM_GRAYBGONLOSTFOCUS message to enable or disable the graying of a ZeeGrid that has lost the keyboard input focus.
wParam = (WPARAM) (BOOL) fEnable; //enable flag
lParam = 0; //not used; must be zero
This message does not return a value.
Graying of ZeeGrids that have lost the keyboard input focus is disabled by default.