Function CreateMDIWindowW

pub unsafe extern "C" fn CreateMDIWindowW(
    lpClassName: LPCWSTR,
    lpWindowName: LPCWSTR,
    dwStyle: DWORD,
    X: c_int,
    Y: c_int,
    nWidth: c_int,
    nHeight: c_int,
    hWndParent: HWND,
    hInstance: HINSTANCE,
    lParam: LPARAM,
) -> HWND