color listbox

I have a listbox that was created like this:
    hwndChild = CreateWindowEx (WS_EX_CLIENTEDGE, TEXT ("listbox"),
                         TEXT (""), WS_VISIBLE | WS_CHILD | WS_VSCROLL
|
                         LBS_USETABSTOPS | LBS_NOINTEGRALHEIGHT, 0,
0,
                         100, 100,hWnd, (HMENU)IDC_RPTLIST, hInst,
NULL);



I would like to change its color to red or green a certian points
thruout the program and cannot figure out how to do that.

Any help would be greatly appreciated.

Thanks,
Tia