#if(WINVER >= 0x0400)
typedef struct tagNMHDR
{
    HWND      hwndFrom;
    UINT_PTR  idFrom;
    UINT      code;         // NM_ code
}   NMHDR;
typedef NMHDR FAR * LPNMHDR;

typedef struct tagSTYLESTRUCT
{
    DWORD   styleOld;
    DWORD   styleNew;
} STYLESTRUCT, * LPSTYLESTRUCT;
#endif /* WINVER >= 0x0400 */