Function CreateWindowEx 

pub unsafe extern "system" fn CreateWindowEx(
    dwexstyle: u32,
    lpclassname: *const u16,
    lpwindowname: *const u16,
    dwstyle: u32,
    x: i32,
    y: i32,
    nwidth: i32,
    nheight: i32,
    hwndparent: *mut c_void,
    hmenu: *mut c_void,
    hinstance: *mut c_void,
    lpparam: *const c_void,
) -> *mut c_void

#27a CreateWindowEx

make a window