MFC：class and struct

1 typedef struct tagMSG {
2     HWND    hwnd;
3     UINT      message;
4     WPARAM wParam;
5     LPARAM   lParam;
6     DWORD   time;
7     POINT      pt;
8 }  MSG;

 1 typedef struct _WNDCLASS {
 2   UINT style; 
 3   WNDPROC lpfnWndProc; 
 4   int cbClsExtra; 
 5   int cbWndExtra; 
 6   HANDLE hInstance; 
 7   HICON hIcon; 
 8   HCURSOR hCursor; 
 9   HBRUSH hbrBackground; 
10   LPCTSTR lpszMenuName; 
11   LPCTSTR lpszClassName; 
12 } WNDCLASS;