typedef struct tagMOUSEHOOKSTRUCTEX : public tagMOUSEHOOKSTRUCT
{
    DWORD   mouseData;
} MOUSEHOOKSTRUCTEX, *LPMOUSEHOOKSTRUCTEX, *PMOUSEHOOKSTRUCTEX;

typedef struct tagMOUSEHOOKSTRUCTEX
{
    MOUSEHOOKSTRUCT;
    DWORD   mouseData;
} MOUSEHOOKSTRUCTEX, *LPMOUSEHOOKSTRUCTEX, *PMOUSEHOOKSTRUCTEX;