adding data to a combobox

[kalesh777]

I have made a combobox

hwndcountry=CreateWindow("COMBOBOX", "", WS_CHILD | WS_VISIBLE | ES_READONLY | CBS_DROPDOWNLIST| CBS_HASSTRINGS, 50,30,100,30, hwnd,(HMENU)5, ((LPCREATESTRUCT) lParam)->hInstance, NULL);

now how can I add items to it?