WNDCLASSEX wcex;

wcex.cbSize = sizeof (WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = (WNDPROC)MsgProc;
wcex.cbClsExtra = 0;
wcex.cbClsExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = NULL;
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "WIN32雛型";
wcex.hIconSm = NULL;

RegisterClassEx(&wcex);

これでウインドウクラスが登録できねぇ
どっか間違ってる?