Function user32::CreateWindowExA

pub unsafe extern "system" fn CreateWindowExA(
    dwExStyle: DWORD, 
    lpClassName: LPCSTR, 
    lpWindowName: LPCSTR, 
    dwStyle: DWORD, 
    x: c_int, 
    y: c_int, 
    nWidth: c_int, 
    nHeight: c_int, 
    hWndParent: HWND, 
    hMenu: HMENU, 
    hInstance: HINSTANCE, 
    lpParam: LPVOID
) -> HWND