An application sends a ZGM_SETLOSTFOCUSHIGHTLIGHTCOLOR message to set the color index of the color palette to be used for displaying the highlight color when the ZeeGrid loses input focus.
ZGM_SETLOSTFOCUSHIGHLIGHTCOLOR
wParam = (WPARAM)(int) iCPIndex; //Color palette index
lParam = 0; //not used; must be zero
This message does not return a value.
By default, the highlight color is black for a ZeeGrid that has lost the input focus.